diff --git a/src/Configurator/BundlesConfigurator.php b/src/Configurator/BundlesConfigurator.php
index 8c582a661..5fa33f94a 100644
--- a/src/Configurator/BundlesConfigurator.php
+++ b/src/Configurator/BundlesConfigurator.php
@@ -53,7 +53,7 @@ public function unconfigure(Recipe $recipe, $bundles): void
         $this->dump($file, $registered);
     }
 
-    private function parse(iterable $manifest, iterable $registered): iterable
+    private function parse($manifest, $registered)
     {
         $bundles = [];
         foreach ($manifest as $class => $envs) {
@@ -65,7 +65,7 @@ private function parse(iterable $manifest, iterable $registered): iterable
         return $bundles;
     }
 
-    private function load(string $file): iterable
+    private function load(string $file)
     {
         $bundles = file_exists($file) ? (require $file) : [];
         if (!is_array($bundles)) {
@@ -75,7 +75,7 @@ private function load(string $file): iterable
         return $bundles;
     }
 
-    private function dump(string $file, iterable $bundles): void
+    private function dump(string $file, $bundles): void
     {
         $contents = "<?php\n\nreturn [\n";
         foreach ($bundles as $class => $envs) {
diff --git a/src/Configurator/ContainerConfigurator.php b/src/Configurator/ContainerConfigurator.php
index 88569a458..00bb95b52 100644
--- a/src/Configurator/ContainerConfigurator.php
+++ b/src/Configurator/ContainerConfigurator.php
@@ -40,7 +40,7 @@ public function unconfigure(Recipe $recipe, $parameters): void
         file_put_contents($target, implode('', $lines));
     }
 
-    private function addParameters(iterable $parameters): void
+    private function addParameters($parameters): void
     {
         $target = getcwd().'/config/services.yaml';
         $lines = [];
diff --git a/src/Configurator/CopyFromPackageConfigurator.php b/src/Configurator/CopyFromPackageConfigurator.php
index 8e293cb70..39f574c84 100644
--- a/src/Configurator/CopyFromPackageConfigurator.php
+++ b/src/Configurator/CopyFromPackageConfigurator.php
@@ -32,7 +32,7 @@ public function unconfigure(Recipe $recipe, $config): void
         $this->removeFiles($config, $packageDir, getcwd());
     }
 
-    private function copyFiles(iterable $manifest, string $from, string $to): void
+    private function copyFiles($manifest, string $from, string $to): void
     {
         foreach ($manifest as $source => $target) {
             $target = $this->options->expandTargetDir($target);
@@ -50,7 +50,7 @@ private function copyFiles(iterable $manifest, string $from, string $to): void
         }
     }
 
-    private function removeFiles(iterable $manifest, string $from, string $to): void
+    private function removeFiles($manifest, string $from, string $to): void
     {
         foreach ($manifest as $source => $target) {
             $target = $this->options->expandTargetDir($target);
diff --git a/src/Configurator/CopyFromRecipeConfigurator.php b/src/Configurator/CopyFromRecipeConfigurator.php
index 5e6fb95ca..2845d76b4 100644
--- a/src/Configurator/CopyFromRecipeConfigurator.php
+++ b/src/Configurator/CopyFromRecipeConfigurator.php
@@ -30,7 +30,7 @@ public function unconfigure(Recipe $recipe, $config): void
         $this->removeFiles($config, $recipe->getFiles(), getcwd());
     }
 
-    private function copyFiles(iterable $manifest, iterable $files, string $to): void
+    private function copyFiles($manifest, $files, string $to): void
     {
         foreach ($manifest as $source => $target) {
             $target = $this->options->expandTargetDir($target);
@@ -42,7 +42,7 @@ private function copyFiles(iterable $manifest, iterable $files, string $to): voi
         }
     }
 
-    private function copyDir(string $source, string $target, iterable $files): void
+    private function copyDir(string $source, string $target, $files): void
     {
         foreach ($files as $file => $data) {
             if (0 === strpos($file, $source)) {
@@ -68,7 +68,7 @@ private function copyFile(string $to, string $contents, bool $executable): void
         }
     }
 
-    private function removeFiles(iterable $manifest, iterable $files, string $to): void
+    private function removeFiles($manifest, $files, string $to): void
     {
         foreach ($manifest as $source => $target) {
             $target = $this->options->expandTargetDir($target);
diff --git a/src/Downloader.php b/src/Downloader.php
index cd3690011..f6149545a 100644
--- a/src/Downloader.php
+++ b/src/Downloader.php
@@ -174,7 +174,7 @@ public function get(string $path, array $headers = [], $cache = true): Response
         }
     }
 
-    private function fetchFile(string $url, string $cacheKey, iterable $headers): Response
+    private function fetchFile(string $url, string $cacheKey, $headers): Response
     {
         $options = $this->getOptions($headers);
         $retries = 3;
@@ -204,7 +204,7 @@ private function fetchFile(string $url, string $cacheKey, iterable $headers): Re
         }
     }
 
-    private function fetchFileIfLastModified(string $url, string $cacheKey, string $lastModifiedTime, iterable $headers): Response
+    private function fetchFileIfLastModified(string $url, string $cacheKey, string $lastModifiedTime, $headers): Response
     {
         $headers[] = 'If-Modified-Since: '.$lastModifiedTime;
         $options = $this->getOptions($headers);
diff --git a/src/Recipe.php b/src/Recipe.php
index b87872898..6759fa6da 100644
--- a/src/Recipe.php
+++ b/src/Recipe.php
@@ -55,7 +55,7 @@ public function getManifest(): array
         return $this->data['manifest'];
     }
 
-    public function getFiles(): iterable
+    public function getFiles()
     {
         return $this->data['files'] ?? [];
     }
diff --git a/src/Response.php b/src/Response.php
index af7679c2a..03019c871 100644
--- a/src/Response.php
+++ b/src/Response.php
@@ -24,7 +24,7 @@ class Response implements \JsonSerializable
     /**
      * @param mixed $body The response as JSON
      */
-    public function __construct($body, iterable $headers = [], int $code = 200)
+    public function __construct($body, $headers = [], int $code = 200)
     {
         $this->body = $body;
         $this->origHeaders = $headers;
@@ -52,7 +52,7 @@ public function getBody()
         return $this->body;
     }
 
-    public function getOrigHeaders(): iterable
+    public function getOrigHeaders()
     {
         return $this->origHeaders;
     }
@@ -74,7 +74,7 @@ public function jsonSerialize()
         return ['body' => $this->body, 'headers' => $this->headers];
     }
 
-    private function parseHeaders(iterable $headers): array
+    private function parseHeaders($headers): array
     {
         $values = [];
         foreach (array_reverse($headers) as $header) {