diff --git a/.github/workflows/quality-assurance.yaml b/.github/workflows/quality-assurance.yaml
new file mode 100644
index 0000000..a9c5aaf
--- /dev/null
+++ b/.github/workflows/quality-assurance.yaml
@@ -0,0 +1,35 @@
+name: Quality Assurance
+
+on:
+    push:
+        branches: [main]
+    pull_request:
+        types: [opened, synchronize, reopened, ready_for_review]
+
+env:
+    APP_ENV: test
+    PHP_EXTENSIONS: mbstring, bcmath, sqlite3, gd, intl
+
+jobs:
+    coding-standards:
+        name: "Coding Standards"
+        runs-on: ${{ matrix.operating-system }}
+        strategy:
+            matrix:
+                operating-system: [ 'ubuntu-latest' ]
+                php-versions: [ '7.4', '8.0' ]
+        steps:
+            -   name: "Install PHP"
+                uses: shivammathur/setup-php@v2
+                with:
+                    php-version: ${{ matrix.php-versions }}
+                    extensions: ${{ env.PHP_EXTENSIONS }}
+
+            -   name: "Checkout"
+                uses: actions/checkout@v2
+
+            -   name: "Composer Install"
+                run: composer install --no-interaction --no-progress --no-suggest
+
+            -   name: "Easy coding standard"
+                run: ./vendor/bin/ecs check ./src
diff --git a/composer.json b/composer.json
index e1fb47c..0fe35d4 100644
--- a/composer.json
+++ b/composer.json
@@ -10,14 +10,17 @@
     }
   ],
   "require": {
-    "php": "^7.4"
+    "php": ">=7.4 || 8.0"
   },
   "require-dev": {
     "antiseptikk/dev-kit": "^1.0",
     "phpcompatibility/phpcompatibility-wp": "^2.1.0",
     "phpunit/phpunit": "^7.3.0",
     "brain/monkey": "^2.2.0",
-    "giacocorsiglia/wordpress-stubs": "^4.9.5"
+    "giacocorsiglia/wordpress-stubs": "^4.9.5",
+    "szepeviktor/phpstan-wordpress": "^0.7.4",
+    "humanmade/psalm-plugin-wordpress": "^2.0",
+    "php-stubs/wordpress-stubs": "^5.7"
   },
   "autoload": {
     "psr-4": {
diff --git a/phpstan.neon b/phpstan.neon
new file mode 100644
index 0000000..6921f00
--- /dev/null
+++ b/phpstan.neon
@@ -0,0 +1,9 @@
+includes:
+    - vendor/szepeviktor/phpstan-wordpress/extension.neon
+
+parameters:
+    level: 5
+    paths:
+        - plugin.php
+        - uninstall.php
+        - src/
diff --git a/psalm.xml b/psalm.xml
new file mode 100644
index 0000000..74c131d
--- /dev/null
+++ b/psalm.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0"?>
+<psalm
+        errorLevel="1"
+        resolveFromConfigFile="true"
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xmlns="https://getpsalm.org/schema/config"
+        xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
+>
+    <projectFiles>
+        <directory name="src"/>
+        <ignoreFiles>
+            <directory name="vendor"/>
+        </ignoreFiles>
+    </projectFiles>
+    <plugins>
+        <pluginClass class="PsalmWordPress\Plugin"/>
+    </plugins>
+    <stubs>
+        <file name="vendor/php-stubs/wordpress-stubs/wordpress-stubs.php" />
+    </stubs>
+</psalm>
diff --git a/src/Encore.php b/src/Encore.php
index e401c4d..7bf59ee 100644
--- a/src/Encore.php
+++ b/src/Encore.php
@@ -33,7 +33,7 @@ class Encore
      */
     private string $rootUrl = '';
 
-    public function __construct($outputPath, $version, $url, $themePath = null)
+    public function __construct(string $outputPath, string $version, string $url, ?string $themePath = null)
     {
         $this->outputPath = $outputPath;
         $this->version = $version;