diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 78fd5a3..80c1af7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,12 +12,15 @@ jobs:
     - name: Run test suite
       run: vendor/bin/phpunit --coverage-text
     - name: Create phar archive
-      run: php -d phar.readonly=0 bin/compile
+      run: |
+        wget https://github.com/box-project/box/releases/download/3.8.5/box.phar
+        mkdir -p build
+        php -d phar.readonly=0 box.phar compile
     - uses: actions/upload-artifact@master
       if: startsWith(github.ref, 'refs/tags/')
       with:
         name: soap_client.phar
-        path: soap_client.phar
+        path: build/soap_client.phar
   release:
     runs-on: ubuntu-latest
     needs: build
diff --git a/.gitignore b/.gitignore
index 76283a0..32eece0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,3 @@
-/soap_client.phar
-
-/vendor/
-/build
 /.php_cs.cache
+/build
+/vendor/
diff --git a/Makefile b/Makefile
index 95db8dc..756e400 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 .PHONY: clean
 build: clean
-	bin/compile
-	chmod +x soap_client.phar
+	mkdir -p build
+	box compile
 
 
 .PHONY: clean
@@ -16,17 +16,11 @@ test: clean
 	vendor/bin/phpunit
 
 
-.PHONY: phpmd
-phpmd:
-	vendor/bin/phpmd src text codesize,unusedcode,naming,design; [ $$? -eq 2 ] && true
-
-
 .PHONY: coverage
 coverage: clean
 	vendor/bin/phpunit --coverage-text
 
 
-# Install the binary into /usr/local/bin
 .PHONY: install
 install:
 	mkdir -p /usr/local/bin
diff --git a/README.md b/README.md
index b207045..1a451d5 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ the `help`:
 
 This will output something like:
 
-    php-soap-client version 3.0.1
+    php-soap-client version 3.0.3
 
     Usage:
       [options] command [arguments]
diff --git a/bin/compile b/bin/compile
deleted file mode 100755
index 1afdfcf..0000000
--- a/bin/compile
+++ /dev/null
@@ -1,74 +0,0 @@
-#!/usr/bin/env php
-<?php
-
-require_once __DIR__.'/../vendor/autoload.php';
-
-use Symfony\Component\Finder\Finder;
-
-if (file_exists('soap_client.phar')) {
-    unlink('soap_client.phar');
-}
-
-function stripWhiteSpace($source)
-{
-    $output = '';
-    foreach (token_get_all($source) as $token) {
-        if (is_string($token)) {
-            $output .= $token;
-        } elseif (in_array($token[0], array(T_COMMENT, T_DOC_COMMENT))) {
-            $output .= str_repeat("\n", substr_count($token[1], "\n"));
-        } elseif (T_WHITESPACE === $token[0]) {
-            // reduce wide spaces
-            $whitespace = preg_replace('{[ \t]+}', ' ', $token[1]);
-            // normalize newlines to \n
-            $whitespace = preg_replace('{(?:\r\n|\r|\n)}', "\n", $whitespace);
-            // trim leading spaces
-            $whitespace = preg_replace('{\n +}', "\n", $whitespace);
-            $output .= $whitespace;
-        } else {
-            $output .= $token[1];
-        }
-    }
-
-    return $output;
-}
-
-echo "==> Creating phar in soap_client.phar\n";
-
-$phar = new \Phar('soap_client.phar', 0, 'soap_client.phar');
-$phar->setSignatureAlgorithm(\Phar::SHA1);
-$phar->startBuffering();
-
-$finder = new Finder();
-$finder
-    ->files()
-    ->ignoreVCS(true)
-    ->in(__DIR__.'/../bin')
-    ->in(__DIR__.'/../config')
-    ->in(__DIR__.'/../src')
-    ->in(__DIR__.'/../vendor')
-    ->exclude('Tests')
-    ->exclude('tests')
-    ->name('*.php')
-    ->name('*.yml')
-    ->name('console');
-
-foreach ($finder as $file) {
-    $path = str_replace(dirname(__DIR__).DIRECTORY_SEPARATOR, '', $file->getRealPath());
-    $content = preg_replace('{^#!/usr/bin/env php\s*}', '', $file->getContents());
-    $phar->addFromString($path, stripWhiteSpace($content));
-}
-
-$phar->setStub("#!/usr/bin/env php
-<?php
-Phar::mapPhar('soap_client.phar');
-require 'phar://soap_client.phar/bin/console';
-__HALT_COMPILER();");
-
-$phar->stopBuffering();
-$phar->compressFiles(\Phar::GZ);
-
-unset($phar);
-chmod('soap_client.phar', 0755);
-
-echo "==> Done creating phar archive\n";
diff --git a/box.json b/box.json
new file mode 100644
index 0000000..bff417a
--- /dev/null
+++ b/box.json
@@ -0,0 +1,8 @@
+{
+  "output": "build/soap_client.phar",
+  "algorithm": "SHA512",
+  "force-autodiscovery": true,
+  "directories": [
+    "config"
+  ]
+}
diff --git a/composer.lock b/composer.lock
index c5c1c07..325a9de 100644
--- a/composer.lock
+++ b/composer.lock
@@ -57,16 +57,16 @@
         },
         {
             "name": "psr/log",
-            "version": "1.1.2",
+            "version": "1.1.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/php-fig/log.git",
-                "reference": "446d54b4cb6bf489fc9d75f55843658e6f25d801"
+                "reference": "0f73288fd15629204f9d42b7055f72dacbe811fc"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/php-fig/log/zipball/446d54b4cb6bf489fc9d75f55843658e6f25d801",
-                "reference": "446d54b4cb6bf489fc9d75f55843658e6f25d801",
+                "url": "https://api.github.com/repos/php-fig/log/zipball/0f73288fd15629204f9d42b7055f72dacbe811fc",
+                "reference": "0f73288fd15629204f9d42b7055f72dacbe811fc",
                 "shasum": ""
             },
             "require": {
@@ -100,20 +100,20 @@
                 "psr",
                 "psr-3"
             ],
-            "time": "2019-11-01T11:05:21+00:00"
+            "time": "2020-03-23T09:12:05+00:00"
         },
         {
             "name": "symfony/config",
-            "version": "v3.4.36",
+            "version": "v3.4.44",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/config.git",
-                "reference": "a599a867d0e4a07c342b5f1e656b3915a540ddbe"
+                "reference": "801a3bbc17fb1ba44b0d7d41a6db7a0b74953595"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/config/zipball/a599a867d0e4a07c342b5f1e656b3915a540ddbe",
-                "reference": "a599a867d0e4a07c342b5f1e656b3915a540ddbe",
+                "url": "https://api.github.com/repos/symfony/config/zipball/801a3bbc17fb1ba44b0d7d41a6db7a0b74953595",
+                "reference": "801a3bbc17fb1ba44b0d7d41a6db7a0b74953595",
                 "shasum": ""
             },
             "require": {
@@ -164,20 +164,34 @@
             ],
             "description": "Symfony Config Component",
             "homepage": "https://symfony.com",
-            "time": "2019-12-01T10:45:41+00:00"
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-08-10T07:13:15+00:00"
         },
         {
             "name": "symfony/console",
-            "version": "v3.4.36",
+            "version": "v3.4.44",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
-                "reference": "1ee23b3b659b06c622f2bd2492a229e416eb4586"
+                "reference": "71da881ad579f0cd66aef8677e4cf6217d8ecd0c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/console/zipball/1ee23b3b659b06c622f2bd2492a229e416eb4586",
-                "reference": "1ee23b3b659b06c622f2bd2492a229e416eb4586",
+                "url": "https://api.github.com/repos/symfony/console/zipball/71da881ad579f0cd66aef8677e4cf6217d8ecd0c",
+                "reference": "71da881ad579f0cd66aef8677e4cf6217d8ecd0c",
                 "shasum": ""
             },
             "require": {
@@ -236,25 +250,40 @@
             ],
             "description": "Symfony Console Component",
             "homepage": "https://symfony.com",
-            "time": "2019-12-01T10:04:45+00:00"
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-08-09T08:16:57+00:00"
         },
         {
             "name": "symfony/debug",
-            "version": "v4.4.2",
+            "version": "v4.4.13",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/debug.git",
-                "reference": "5c4c1db977dc70bb3250e1308d3e8c6341aa38f5"
+                "reference": "aeb73aca16a8f1fe958230fe44e6cf4c84cbb85e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/debug/zipball/5c4c1db977dc70bb3250e1308d3e8c6341aa38f5",
-                "reference": "5c4c1db977dc70bb3250e1308d3e8c6341aa38f5",
+                "url": "https://api.github.com/repos/symfony/debug/zipball/aeb73aca16a8f1fe958230fe44e6cf4c84cbb85e",
+                "reference": "aeb73aca16a8f1fe958230fe44e6cf4c84cbb85e",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3",
-                "psr/log": "~1.0"
+                "php": ">=7.1.3",
+                "psr/log": "~1.0",
+                "symfony/polyfill-php80": "^1.15"
             },
             "conflict": {
                 "symfony/http-kernel": "<3.4"
@@ -292,20 +321,34 @@
             ],
             "description": "Symfony Debug Component",
             "homepage": "https://symfony.com",
-            "time": "2019-12-16T14:46:54+00:00"
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-08-10T07:47:39+00:00"
         },
         {
             "name": "symfony/dependency-injection",
-            "version": "v3.4.36",
+            "version": "v3.4.44",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/dependency-injection.git",
-                "reference": "0d201916bfb3af939fec3c0c8815ea16c60ac1a2"
+                "reference": "7d15cf4294d4f3610bc741c8fdd54a6baac586d4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/dependency-injection/zipball/0d201916bfb3af939fec3c0c8815ea16c60ac1a2",
-                "reference": "0d201916bfb3af939fec3c0c8815ea16c60ac1a2",
+                "url": "https://api.github.com/repos/symfony/dependency-injection/zipball/7d15cf4294d4f3610bc741c8fdd54a6baac586d4",
+                "reference": "7d15cf4294d4f3610bc741c8fdd54a6baac586d4",
                 "shasum": ""
             },
             "require": {
@@ -363,20 +406,34 @@
             ],
             "description": "Symfony DependencyInjection Component",
             "homepage": "https://symfony.com",
-            "time": "2019-12-01T08:33:36+00:00"
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-08-10T07:13:15+00:00"
         },
         {
             "name": "symfony/event-dispatcher",
-            "version": "v3.4.36",
+            "version": "v3.4.44",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/event-dispatcher.git",
-                "reference": "f9031c22ec127d4a2450760f81a8677fe8a10177"
+                "reference": "a0f6858fbf7a524747e87a4c336cab7d0b67c802"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/f9031c22ec127d4a2450760f81a8677fe8a10177",
-                "reference": "f9031c22ec127d4a2450760f81a8677fe8a10177",
+                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/a0f6858fbf7a524747e87a4c336cab7d0b67c802",
+                "reference": "a0f6858fbf7a524747e87a4c336cab7d0b67c802",
                 "shasum": ""
             },
             "require": {
@@ -426,24 +483,38 @@
             ],
             "description": "Symfony EventDispatcher Component",
             "homepage": "https://symfony.com",
-            "time": "2019-10-24T15:33:53+00:00"
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-08-12T14:55:37+00:00"
         },
         {
             "name": "symfony/filesystem",
-            "version": "v4.4.2",
+            "version": "v4.4.13",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/filesystem.git",
-                "reference": "40c2606131d56eff6f193b6e2ceb92414653b591"
+                "reference": "27575bcbc68db1f6d06218891296572c9b845704"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/filesystem/zipball/40c2606131d56eff6f193b6e2ceb92414653b591",
-                "reference": "40c2606131d56eff6f193b6e2ceb92414653b591",
+                "url": "https://api.github.com/repos/symfony/filesystem/zipball/27575bcbc68db1f6d06218891296572c9b845704",
+                "reference": "27575bcbc68db1f6d06218891296572c9b845704",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3",
+                "php": ">=7.1.3",
                 "symfony/polyfill-ctype": "~1.8"
             },
             "type": "library",
@@ -476,20 +547,34 @@
             ],
             "description": "Symfony Filesystem Component",
             "homepage": "https://symfony.com",
-            "time": "2019-11-26T23:16:41+00:00"
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-08-21T17:19:37+00:00"
         },
         {
             "name": "symfony/finder",
-            "version": "v3.4.36",
+            "version": "v3.4.44",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/finder.git",
-                "reference": "290ae21279b37bfd287cdcce640d51204e84afdf"
+                "reference": "5ec813ccafa8164ef21757e8c725d3a57da59200"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/finder/zipball/290ae21279b37bfd287cdcce640d51204e84afdf",
-                "reference": "290ae21279b37bfd287cdcce640d51204e84afdf",
+                "url": "https://api.github.com/repos/symfony/finder/zipball/5ec813ccafa8164ef21757e8c725d3a57da59200",
+                "reference": "5ec813ccafa8164ef21757e8c725d3a57da59200",
                 "shasum": ""
             },
             "require": {
@@ -525,20 +610,34 @@
             ],
             "description": "Symfony Finder Component",
             "homepage": "https://symfony.com",
-            "time": "2019-11-17T21:55:15+00:00"
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-02-14T07:34:21+00:00"
         },
         {
             "name": "symfony/polyfill-ctype",
-            "version": "v1.13.1",
+            "version": "v1.18.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-ctype.git",
-                "reference": "f8f0b461be3385e56d6de3dbb5a0df24c0c275e3"
+                "reference": "1c302646f6efc070cd46856e600e5e0684d6b454"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/f8f0b461be3385e56d6de3dbb5a0df24c0c275e3",
-                "reference": "f8f0b461be3385e56d6de3dbb5a0df24c0c275e3",
+                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/1c302646f6efc070cd46856e600e5e0684d6b454",
+                "reference": "1c302646f6efc070cd46856e600e5e0684d6b454",
                 "shasum": ""
             },
             "require": {
@@ -550,7 +649,11 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.13-dev"
+                    "dev-master": "1.18-dev"
+                },
+                "thanks": {
+                    "name": "symfony/polyfill",
+                    "url": "https://github.com/symfony/polyfill"
                 }
             },
             "autoload": {
@@ -583,20 +686,34 @@
                 "polyfill",
                 "portable"
             ],
-            "time": "2019-11-27T13:56:44+00:00"
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-07-14T12:35:20+00:00"
         },
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.13.1",
+            "version": "v1.18.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-mbstring.git",
-                "reference": "7b4aab9743c30be783b73de055d24a39cf4b954f"
+                "reference": "a6977d63bf9a0ad4c65cd352709e230876f9904a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/7b4aab9743c30be783b73de055d24a39cf4b954f",
-                "reference": "7b4aab9743c30be783b73de055d24a39cf4b954f",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/a6977d63bf9a0ad4c65cd352709e230876f9904a",
+                "reference": "a6977d63bf9a0ad4c65cd352709e230876f9904a",
                 "shasum": ""
             },
             "require": {
@@ -608,7 +725,11 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.13-dev"
+                    "dev-master": "1.18-dev"
+                },
+                "thanks": {
+                    "name": "symfony/polyfill",
+                    "url": "https://github.com/symfony/polyfill"
                 }
             },
             "autoload": {
@@ -642,20 +763,114 @@
                 "portable",
                 "shim"
             ],
-            "time": "2019-11-27T14:18:11+00:00"
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-07-14T12:35:20+00:00"
+        },
+        {
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+            "time": "2020-01-08T08:45:45+00:00"
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@@ -2493,27 +2775,93 @@
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+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
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+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
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+                "php": ">=7.2.5",
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@@ -2545,20 +2893,34 @@
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@@ -2604,20 +2970,34 @@
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-            "time": "2019-11-27T13:56:44+00:00"
+            "funding": [
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+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
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+                    "type": "tidelift"
+                }
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+            "time": "2020-07-14T12:35:20+00:00"
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         {
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-            "version": "v1.13.1",
+            "version": "v1.18.1",
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                 "url": "https://github.com/symfony/polyfill-php72.git",
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@@ -2626,7 +3006,11 @@
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+                    "dev-master": "1.18-dev"
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+                    "url": "https://github.com/symfony/polyfill"
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@@ -2659,29 +3043,44 @@
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-            "time": "2019-11-27T13:56:44+00:00"
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
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+                    "type": "tidelift"
+                }
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+            "time": "2020-07-14T12:35:20+00:00"
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-            "version": "v5.0.2",
+            "version": "v5.1.5",
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-                "php": "^7.2.5"
+                "php": ">=7.2.5",
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@@ -2708,24 +3107,38 @@
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             "homepage": "https://symfony.com",
-            "time": "2019-12-10T11:06:55+00:00"
+            "funding": [
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+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-07-23T08:36:24+00:00"
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-            "version": "v2.0.1",
+            "version": "v2.1.3",
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                 "url": "https://github.com/symfony/service-contracts.git",
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+                "php": ">=7.2.5",
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@@ -2734,7 +3147,11 @@
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+                    "dev-master": "2.1-dev"
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+                    "url": "https://github.com/symfony/contracts"
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@@ -2766,30 +3183,44 @@
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-            "time": "2019-11-18T17:27:11+00:00"
+            "funding": [
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+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-07-06T13:23:11+00:00"
         },
         {
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-            "version": "v5.0.2",
+            "version": "v5.1.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/stopwatch.git",
-                "reference": "d410282956706e0b08681a5527447a8e6b6f421e"
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+                "php": ">=7.2.5",
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             "extra": {
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+                    "dev-master": "5.1-dev"
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@@ -2816,27 +3247,41 @@
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             "description": "Symfony Stopwatch Component",
             "homepage": "https://symfony.com",
-            "time": "2019-11-18T17:27:11+00:00"
+            "funding": [
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+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-05-20T17:43:50+00:00"
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         {
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-            "version": "1.1.3",
+            "version": "1.2.0",
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                 "url": "https://github.com/theseer/tokenizer.git",
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                 "ext-tokenizer": "*",
                 "ext-xmlwriter": "*",
-                "php": "^7.0"
+                "php": "^7.2 || ^8.0"
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@@ -2856,28 +3301,35 @@
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             ],
             "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
-            "time": "2019-06-13T22:48:21+00:00"
+            "funding": [
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+                    "url": "https://github.com/theseer",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-07-12T23:59:07+00:00"
         },
         {
             "name": "webmozart/assert",
-            "version": "1.6.0",
+            "version": "1.9.1",
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                 "url": "https://github.com/webmozart/assert.git",
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+                "php": "^5.3.3 || ^7.0 || ^8.0",
                 "symfony/polyfill-ctype": "^1.8"
             },
             "conflict": {
-                "vimeo/psalm": "<3.6.0"
+                "phpstan/phpstan": "<0.12.20",
+                "vimeo/psalm": "<3.9.1"
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@@ -2904,7 +3356,7 @@
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-            "time": "2019-11-24T13:36:37+00:00"
+            "time": "2020-07-08T17:02:28+00:00"
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@@ -2915,5 +3367,6 @@
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-    "platform-dev": []
+    "platform-dev": [],
+    "plugin-api-version": "1.1.0"
 }
diff --git a/config/app.yml b/config/app.yml
index b7011b8..c04545c 100644
--- a/config/app.yml
+++ b/config/app.yml
@@ -14,7 +14,7 @@ services:
     class: Symfony\Component\Console\Application
     arguments:
       - "php-soap-client"
-      - "3.0.1"
+      - "3.0.3"
     calls:
       - [setDispatcher, ["@symfony.event_dispatcher"]]
       - [add, ["@console_command.get_wsdl"]]
diff --git a/src/Client/SoapClient.php b/src/Client/SoapClient.php
index a8f670e..446c9ec 100644
--- a/src/Client/SoapClient.php
+++ b/src/Client/SoapClient.php
@@ -2,7 +2,9 @@
 
 namespace App\Client;
 
-class SoapClient extends \SoapClient
+use SoapClient as PhpSoapClient;
+
+class SoapClient extends PhpSoapClient
 {
     protected $default_value = '%%?%%';
 
diff --git a/src/Command/Base/SoapCommand.php b/src/Command/Base/SoapCommand.php
index c656834..3a64b94 100644
--- a/src/Command/Base/SoapCommand.php
+++ b/src/Command/Base/SoapCommand.php
@@ -9,12 +9,12 @@ trait SoapCommand
 {
     protected $soapClient;
 
-    public function setSoapClient(SoapClient $soapClient)
+    public function setSoapClient(SoapClient $soapClient): void
     {
         $this->soapClient = $soapClient;
     }
 
-    protected function configureSoapOptions()
+    protected function configureSoapOptions(): void
     {
         $this->addOption('config', null, InputOption::VALUE_REQUIRED, 'The location to the configuration file', 'soap_client.yml');
         $this->addOption('endpoint', null, InputOption::VALUE_REQUIRED, 'Specify the url to the wsdl of the SOAP webservice to inspect');
diff --git a/src/Command/CallMethodCommand.php b/src/Command/CallMethodCommand.php
index 3bbabe1..d538701 100644
--- a/src/Command/CallMethodCommand.php
+++ b/src/Command/CallMethodCommand.php
@@ -32,7 +32,7 @@ protected function configure()
         $this->addArgument('method', InputArgument::REQUIRED, 'The name of the remote method');
     }
 
-    protected function execute(InputInterface $input, OutputInterface $output)
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         $method = $input->getArgument('method');
 
@@ -76,5 +76,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
         unset($start_time);
 
         $output->writeln((string) print_r($response, true));
+
+        return 0;
     }
 }
diff --git a/src/Command/GetMethodRequestXmlCommand.php b/src/Command/GetMethodRequestXmlCommand.php
index 73743a5..b052490 100644
--- a/src/Command/GetMethodRequestXmlCommand.php
+++ b/src/Command/GetMethodRequestXmlCommand.php
@@ -26,8 +26,10 @@ protected function configure()
         $this->addArgument('method', InputArgument::REQUIRED, 'The name of the remote method');
     }
 
-    protected function execute(InputInterface $input, OutputInterface $output)
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         $output->writeln($this->soapClient->__getRequestXmlForMethod($input->getArgument('method')));
+
+        return 0;
     }
 }
diff --git a/src/Command/GetWsdlCommand.php b/src/Command/GetWsdlCommand.php
index c9230de..67923c5 100644
--- a/src/Command/GetWsdlCommand.php
+++ b/src/Command/GetWsdlCommand.php
@@ -23,8 +23,10 @@ protected function configure()
         $this->configureSoapOptions();
     }
 
-    protected function execute(InputInterface $input, OutputInterface $output)
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         $output->writeln($this->soapClient->getWsdl());
+
+        return 0;
     }
 }
diff --git a/src/Command/ListMethodsCommand.php b/src/Command/ListMethodsCommand.php
index 0e6746e..e5f67b7 100644
--- a/src/Command/ListMethodsCommand.php
+++ b/src/Command/ListMethodsCommand.php
@@ -23,10 +23,12 @@ protected function configure()
         $this->configureSoapOptions();
     }
 
-    protected function execute(InputInterface $input, OutputInterface $output)
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         foreach (array_keys($this->soapClient->__getMethods()) as $method) {
             $output->writeln((string) $method);
         }
+
+        return 0;
     }
 }
diff --git a/src/Helper/EditorHelper.php b/src/Helper/EditorHelper.php
index 1122997..801516c 100644
--- a/src/Helper/EditorHelper.php
+++ b/src/Helper/EditorHelper.php
@@ -8,7 +8,7 @@ class EditorHelper
 {
     protected $editor;
 
-    public function __construct($editor = null)
+    public function __construct(string $editor = null)
     {
         $this->editor = empty($editor) ? @$_SERVER['EDITOR'] : $editor;
 
@@ -17,17 +17,17 @@ public function __construct($editor = null)
         }
     }
 
-    public function getEditor()
+    public function getEditor(): string
     {
         return $this->editor;
     }
 
-    public function setEditor($editor)
+    public function setEditor(string $editor): void
     {
         $this->editor = $editor;
     }
 
-    public function open_and_read($contents = null)
+    public function open_and_read(string $contents = null): string
     {
         $tmpfile = new TmpFile();
 
diff --git a/src/Helper/StdinHelper.php b/src/Helper/StdinHelper.php
index c67e47c..4092dc0 100644
--- a/src/Helper/StdinHelper.php
+++ b/src/Helper/StdinHelper.php
@@ -4,7 +4,7 @@
 
 class StdinHelper
 {
-    public function read($blocking = null)
+    public function read(bool $blocking = null): string
     {
         $stream = fopen('php://stdin', 'r');
 
@@ -16,7 +16,7 @@ public function read($blocking = null)
             stream_set_blocking($stream, (bool) $blocking);
         }
 
-        $buffer = null;
+        $buffer = '';
 
         while ($line = fgets($stream, 4096)) {
             $buffer .= $line;
diff --git a/src/Listener/CommandEventListener.php b/src/Listener/CommandEventListener.php
index b9b5085..11a8e9a 100644
--- a/src/Listener/CommandEventListener.php
+++ b/src/Listener/CommandEventListener.php
@@ -3,20 +3,24 @@
 namespace App\Listener;
 
 use App\Command\Base\SoapCommand;
+use InvalidArgumentException;
+use Psr\Container\ContainerInterface;
 use Symfony\Component\Console\Event\ConsoleCommandEvent;
 
 class CommandEventListener
 {
     protected $container;
 
-    public function __construct($container)
+    public function __construct(ContainerInterface $container)
     {
         $this->container = $container;
     }
 
-    public function onCommandAction(ConsoleCommandEvent $event)
+    public function onCommandAction(ConsoleCommandEvent $event): void
     {
-        $command = $event->getCommand();
+        if (!$command = $event->getCommand()) {
+            return;
+        }
 
         if (!in_array(SoapCommand::class, class_uses($command))) {
             return;
@@ -28,7 +32,7 @@ public function onCommandAction(ConsoleCommandEvent $event)
         // TODO handle endpoint values from configuration
 
         if (!$input->getOption('endpoint')) {
-            throw new \InvalidArgumentException('You must specify an endpoint.');
+            throw new InvalidArgumentException('You must specify an endpoint.');
         }
 
         $this->container->setParameter('soap_endpoint', $input->getOption('endpoint'));
diff --git a/tools/bash-completion b/tools/bash-completion
index 3fcd19e..c3a95a2 100644
--- a/tools/bash-completion
+++ b/tools/bash-completion
@@ -20,7 +20,7 @@ _soap_client_completions()
                         opts="--help --cache --endpoint --quiet --xml --use-editor --verbose -e -q -h -c -x -u -v list wsdl call request"
                         ;;
         esac
-               
+
         COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
         return 0
 }