diff --git a/.travis.sh b/.travis.sh
new file mode 100755
index 0000000..5b1af47
--- /dev/null
+++ b/.travis.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+set -ex
+hhvm --version
+curl https://getcomposer.org/installer | hhvm -d hhvm.jit=0 --php -- /dev/stdin --install-dir=/usr/local/bin --filename=composer
+
+cd /var/source
+hhvm -d hhvm.php7.all=1 -d hhvm.jit=0 -d hhvm.hack.lang.auto_typecheck=0 /usr/local/bin/composer install
+
+hhvm -d hhvm.php7.all=1 -d hhvm.jit=0 -d hhvm.hack.lang.auto_typecheck=0 vendor/bin/phpunit
diff --git a/.travis.yml b/.travis.yml
index 47ed2e2..c75f8a4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,17 @@
-language: php
 sudo: required
-dist: trusty
-php:
- - hhvm
- - hhvm-3.18
-install: composer install
+language: generic
+services:
+ - docker
+env:
+  matrix:
+   - HHVM_VERSION=3.24-lts-latest
+   - HHVM_VERSION=3.25.3
+   - HHVM_VERSION=3.26.0
+   - HHVM_VERSION=latest
+   - HHVM_VERSION=nightly
+install:
+ - docker pull hhvm/hhvm:$HHVM_VERSION
 script:
- - hh_client
- - hhvm vendor/bin/phpunit
+ - env | egrep '^(HHVM_VERSION|GITHUB_API_KEY|TRAVIS_EVENT_TYPE)=' > ./env-list
+ - docker run --env-file ./env-list -v $(pwd):/var/source hhvm/hhvm:$HHVM_VERSION /var/source/.travis.sh
+ 
\ No newline at end of file
diff --git a/README.md b/README.md
index 98c1f3d..701d73f 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ simple light weight service location / dependency injection container
 ## Installation
 
 ```bash
-$ hhvm --php $(which composer) require ytake/hh-container
+$ hhvm $(which composer) require ytake/hh-container
 ```
 
 ```json
diff --git a/composer.json b/composer.json
index 667f401..7627468 100644
--- a/composer.json
+++ b/composer.json
@@ -10,8 +10,8 @@
     "container"
   ],
   "require": {
-    "hhvm": ">=3.12",
-    "hhvm/hhvm-autoload": "^1.5",
+    "hhvm": ">=3.24",
+    "hhvm/hhvm-autoload": "^1.6",
     "ytake/psr-container-hhi": "^1.0"
   },
   "require-dev": {
diff --git a/src/FactoryContainer.hh b/src/FactoryContainer.hh
index 12cac1e..a45ea94 100644
--- a/src/FactoryContainer.hh
+++ b/src/FactoryContainer.hh
@@ -83,23 +83,23 @@ class FactoryContainer implements ContainerInterface {
   public function get($id): mixed {
     if ($this->has($id)) {
       $resolved = $this->bindings->get($id);
-      if (!is_null($resolved)) {
+      if (!\is_null($resolved)) {
         if ($this->scopes->get($id) === Scope::SINGLETON) {
           return $this->shared($id);
         }
 
-        return call_user_func($resolved, $this);
+        return \call_user_func($resolved, $this);
       }
     }
 
     try {
       $reflectionClass = new \ReflectionClass($id);
       if ($reflectionClass->isInstantiable()) {
-        $arguments = [];
+        $arguments = Vector{};
         $constructor = $reflectionClass->getConstructor();
         if ($constructor instanceof \ReflectionMethod) {
           $resolvedParameters = $this->resolveConstructorParameters($id, $constructor);
-          if (count($resolvedParameters)) {
+          if ($resolvedParameters->count()) {
             $arguments = $resolvedParameters;
           }
         }
@@ -107,17 +107,10 @@ class FactoryContainer implements ContainerInterface {
       }
     } catch (\ReflectionException $e) {
       throw new NotFoundException(
-        sprintf('Identifier "%s" is not binding.', $id),
+        \sprintf('Identifier "%s" is not binding.', $id),
       );
     }
-    throw new ContainerException(sprintf('Error retrieving "%s"', $id));
-  }
-
-  protected function resolveParameters(
-    string $id,
-    \ReflectionMethod $constructor,
-  ) : array<mixed> {
-    return $this->resolveConstructorParameters($id, $constructor);
+    throw new ContainerException(\sprintf('Error retrieving "%s"', $id));
   }
 
   <<__Memoize>>
@@ -174,16 +167,16 @@ class FactoryContainer implements ContainerInterface {
   protected function resolveConstructorParameters(
     string $id,
     \ReflectionMethod $constructor,
-  ): array<mixed> {
-    $r = [];
+  ): Vector<mixed> {
+    $r = Vector{};
     if ($parameters = $constructor->getParameters()) {
       foreach ($parameters as $parameter) {
         if (isset($this->parameters[$id])) {
           if (isset($this->parameters[$id][$parameter->getName()])) {
-            $r[] = call_user_func(
+            $r->add(call_user_func(
               $this->parameters[$id][$parameter->getName()],
               $this,
-            );
+            ));
           }
         }
       }
diff --git a/src/ServiceModule.hh b/src/ServiceModule.hh
index db12c07..b61fc51 100644
--- a/src/ServiceModule.hh
+++ b/src/ServiceModule.hh
@@ -19,8 +19,6 @@ namespace Ytake\HHContainer;
 
 <<__ConsistentConstruct>>
 abstract class ServiceModule {
-  /**
-   * @param ContainerInterface $container
-   */
+
   abstract public function provide(FactoryContainer $container): void;
 }
diff --git a/tests/ContainerTest.php b/tests/ContainerTest.php
index 278fa5d..4727008 100644
--- a/tests/ContainerTest.php
+++ b/tests/ContainerTest.php
@@ -1,5 +1,8 @@
 <?hh // strict
 
+use Ytake\HHContainer\FactoryContainer;
+use Ytake\HHContainer\ServiceModule;
+
 final class ContainerTest extends \PHPUnit\Framework\TestCase
 {
   public function testShouldReturnPrimitiveTypes(): void
@@ -91,7 +94,7 @@ public function testShouldResolveConstructorPromotionInstance(): void
 
   public function testShouldResolveDependencyInjectionWithLocation(): void
   {
-    $container = new \Ytake\HHContainer\FactoryContainer();
+    $container = new FactoryContainer();
     $container->set('message.class', $container ==>  new MockMessageClass('testing'));
     $container->parameters(MessageClient::class, 'message', $container ==> $container->get('message.class'));
     $instance = $container->get(MessageClient::class);
@@ -101,11 +104,9 @@ public function testShouldResolveDependencyInjectionWithLocation(): void
   }
 }
 
-class StubModule extends \Ytake\HHContainer\ServiceModule
-{
-  public function provide(\Ytake\HHContainer\FactoryContainer $container): void
-  {
-    $container->set('provide:sample', $container ==> new \stdClass());
+class StubModule extends ServiceModule {
+  public function provide(FactoryContainer $container): void {
+    $container->set(\stdClass::class, $container ==> new \stdClass());
   }
 }