diff --git a/composer.json b/composer.json
index 52d47da..512bbbf 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
   "license": "MIT",
   "require": {
     "php": "^7.0",
-    "phpspec/phpspec": "^4.0",
+    "phpspec/phpspec": "^4.0 || ^5.0",
     "laravel/framework": "^5.4"
   },
   "autoload": {
diff --git a/src/Runner/Maintainer/LaravelMaintainer.php b/src/Runner/Maintainer/LaravelMaintainer.php
index 39dee61..68e8fac 100644
--- a/src/Runner/Maintainer/LaravelMaintainer.php
+++ b/src/Runner/Maintainer/LaravelMaintainer.php
@@ -53,7 +53,7 @@ public function prepare(
         Specification $context,
         MatcherManager $matchers,
         CollaboratorManager $collaborators
-    ) {
+    ) : void {
         $reflection = $example->getSpecification()->getClassReflection()->getMethod('setLaravel');
         $reflection->invokeArgs($context, [$this->laravel]);
     }
@@ -66,7 +66,7 @@ public function teardown(
         Specification $context,
         MatcherManager $matchers,
         CollaboratorManager $collaborators
-    ) {
+    ) : void {
     }
 
     /**
diff --git a/src/Runner/Maintainer/PresenterMaintainer.php b/src/Runner/Maintainer/PresenterMaintainer.php
index 5706374..6bed7c4 100644
--- a/src/Runner/Maintainer/PresenterMaintainer.php
+++ b/src/Runner/Maintainer/PresenterMaintainer.php
@@ -50,7 +50,7 @@ public function prepare(
         Specification $context,
         MatcherManager $matchers,
         CollaboratorManager $collaborators
-    ) {
+    ) : void {
         $reflection = $example->getSpecification()->getClassReflection()->getMethod('setPresenter');
         $reflection->invokeArgs($context, [$this->presenter]);
     }
@@ -63,7 +63,7 @@ public function teardown(
         Specification $context,
         MatcherManager $matchers,
         CollaboratorManager $collaborators
-    ) {
+    ) : void {
     }
 
     /**