diff --git a/composer.json b/composer.json
index c6b3d33..db95e8f 100644
--- a/composer.json
+++ b/composer.json
@@ -17,16 +17,16 @@
     "php": "^8.4.0",
     "atto/codegen-tools": "^0.1.2",
     "psr/http-message": "^2.0",
-    "psr/log": "^3.0",
-    "symfony/console": "^7.4 || ^8.4",
-    "membrane/openapi-reader": "^3.1",
-    "membrane/openapi-router": "0.5.2"
+    "psr/log": "^3.0.2",
+    "symfony/console": "^7.4.11 || ^8.0.11",
+    "membrane/openapi-reader": "^3.1.1",
+    "membrane/openapi-router": "0.5.3"
   },
   "require-dev": {
-    "phpunit/phpunit": "^13.0.5",
-    "phpstan/phpstan": "^2.1.40",
-    "squizlabs/php_codesniffer": "^3.13.5",
-    "guzzlehttp/psr7": "^2.9.0",
+    "phpunit/phpunit": "^13.1.11",
+    "phpstan/phpstan": "^2.1.55",
+    "squizlabs/php_codesniffer": "^4.0.1",
+    "guzzlehttp/psr7": "^2.10.1",
     "mikey179/vfsstream": "^1.6.12"
   },
   "bin": [
diff --git a/src/Filter/String/Implode.php b/src/Filter/String/Implode.php
index 9dc2d04..c10d352 100644
--- a/src/Filter/String/Implode.php
+++ b/src/Filter/String/Implode.php
@@ -23,16 +23,25 @@ public function __construct(
     public function filter(mixed $value): Result
     {
         if (!is_array($value)) {
-            return Result::invalid(
-                $value,
-                new MessageSet(
-                    null,
-                    new Message('Implode Filter expects an array value, %s passed instead', [gettype($value)])
-                )
-            );
+            return Result::invalid($value, new MessageSet(null, new Message(
+                'Implode Filter expects an array value, %s passed instead',
+                [gettype($value)],
+            )));
         }
 
-        return Result::noResult(implode($this->delimiter, $value));
+        $strings = [];
+        foreach ($value as $v) {
+            if (!is_string($v)) {
+                return Result::invalid($value, new MessageSet(null, new Message(
+                    'Implode Filter expects strings, %s passed instead',
+                    [gettype($v)],
+                )));
+            }
+            $strings[] = $v;
+        }
+
+
+        return Result::noResult(implode($this->delimiter, $strings));
     }
 
     public function __toString(): string
diff --git a/src/OpenAPI/Builder/OpenAPIRequestBuilder.php b/src/OpenAPI/Builder/OpenAPIRequestBuilder.php
index 15a17f2..41cba9a 100644
--- a/src/OpenAPI/Builder/OpenAPIRequestBuilder.php
+++ b/src/OpenAPI/Builder/OpenAPIRequestBuilder.php
@@ -93,7 +93,11 @@ private function fromParameters(OpenAPIRequest $specification): array
         }
 
         $fieldSets = [];
-        foreach ($locations as $in => ['required' => $required, 'fields' => $fields, 'beforeSet' => $beforeSet]) {
+        foreach ($locations as $in => $location) {
+            $fields = $location['fields'];
+            $required = $location['required'] ?? [];
+            $beforeSet = $location['beforeSet'] ?? [];
+
             if (!empty($required)) {
                 $beforeSet[] = new RequiredFields(...$required);
             }