diff --git a/composer.lock b/composer.lock
index e22509e..3b7d2ce 100644
--- a/composer.lock
+++ b/composer.lock
@@ -989,16 +989,16 @@
         },
         {
             "name": "composer/pcre",
-            "version": "3.0.0",
+            "version": "3.0.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/pcre.git",
-                "reference": "e300eb6c535192decd27a85bc72a9290f0d6b3bd"
+                "reference": "4482b6409ca6bfc2af043a5711cd21ac3e7a8dfb"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/pcre/zipball/e300eb6c535192decd27a85bc72a9290f0d6b3bd",
-                "reference": "e300eb6c535192decd27a85bc72a9290f0d6b3bd",
+                "url": "https://api.github.com/repos/composer/pcre/zipball/4482b6409ca6bfc2af043a5711cd21ac3e7a8dfb",
+                "reference": "4482b6409ca6bfc2af043a5711cd21ac3e7a8dfb",
                 "shasum": ""
             },
             "require": {
@@ -1040,7 +1040,7 @@
             ],
             "support": {
                 "issues": "https://github.com/composer/pcre/issues",
-                "source": "https://github.com/composer/pcre/tree/3.0.0"
+                "source": "https://github.com/composer/pcre/tree/3.0.2"
             },
             "funding": [
                 {
@@ -1056,7 +1056,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2022-02-25T20:21:48+00:00"
+            "time": "2022-11-03T20:24:16+00:00"
         },
         {
             "name": "composer/semver",
diff --git a/psalm-baseline.xml b/psalm-baseline.xml
index e95de48..5794bdd 100644
--- a/psalm-baseline.xml
+++ b/psalm-baseline.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<files psalm-version="4.27.0@faf106e717c37b8c81721845dba9de3d8deed8ff">
+<files psalm-version="4.29.0@7ec5ffbd5f68ae03782d7fd33fff0c45a69f95b3">
   <file src="src/Extension/EscaperExtensionFactory.php">
     <MixedArgument occurrences="1">
       <code>$config['encoding'] ?? null</code>
@@ -27,27 +27,21 @@
       <code>$config['extension']</code>
       <code>$container-&gt;get(Extension\EscaperExtension::class)</code>
       <code>$container-&gt;get(Extension\UrlExtension::class)</code>
-      <code>$extension</code>
-      <code>$namespace</code>
+      <code>$mezzioConfig</code>
       <code>$path</code>
       <code>$path</code>
+      <code>$platesConfig</code>
     </MixedArgument>
-    <MixedArrayAccess occurrences="2">
-      <code>$config['plates']</code>
-      <code>$config['templates']</code>
-    </MixedArrayAccess>
-    <MixedAssignment occurrences="11">
-      <code>$allPaths</code>
-      <code>$config</code>
+    <MixedArgumentTypeCoercion occurrences="1">
+      <code>$config['extensions']</code>
+    </MixedArgumentTypeCoercion>
+    <MixedAssignment occurrences="6">
       <code>$config</code>
-      <code>$config</code>
-      <code>$config</code>
-      <code>$extension</code>
       <code>$extension</code>
-      <code>$namespace</code>
-      <code>$namespace</code>
+      <code>$mezzioConfig</code>
       <code>$path</code>
       <code>$paths</code>
+      <code>$platesConfig</code>
     </MixedAssignment>
   </file>
   <file src="src/PlatesRenderer.php">
@@ -201,7 +195,7 @@
   </file>
   <file src="test/PlatesEngineFactoryTest.php">
     <InvalidArgument occurrences="1"/>
-    <MixedArgument occurrences="12">
+    <MixedArgument occurrences="14">
       <code>$helper</code>
       <code>$this-&gt;container-&gt;reveal()</code>
       <code>$this-&gt;container-&gt;reveal()</code>
@@ -212,6 +206,8 @@
       <code>$this-&gt;container-&gt;reveal()</code>
       <code>$this-&gt;container-&gt;reveal()</code>
       <code>$this-&gt;container-&gt;reveal()</code>
+      <code>$this-&gt;container-&gt;reveal()</code>
+      <code>$this-&gt;container-&gt;reveal()</code>
       <code>TestExtension::class</code>
       <code>\ZendTest\Expressive\Plates\stdClass::class</code>
     </MixedArgument>
@@ -222,7 +218,11 @@
       <code>array</code>
       <code>array</code>
     </MixedInferredReturnType>
-    <MixedMethodCall occurrences="27">
+    <MixedMethodCall occurrences="31">
+      <code>willReturn</code>
+      <code>willReturn</code>
+      <code>willReturn</code>
+      <code>willReturn</code>
       <code>willReturn</code>
       <code>willReturn</code>
       <code>willReturn</code>
@@ -251,7 +251,8 @@
       <code>willReturn</code>
       <code>willReturn</code>
     </MixedMethodCall>
-    <PossiblyUndefinedMethod occurrences="36">
+    <PossiblyUndefinedMethod occurrences="42">
+      <code>get</code>
       <code>get</code>
       <code>get</code>
       <code>get</code>
@@ -261,6 +262,9 @@
       <code>get</code>
       <code>get</code>
       <code>get</code>
+      <code>get</code>
+      <code>has</code>
+      <code>has</code>
       <code>has</code>
       <code>has</code>
       <code>has</code>
@@ -288,6 +292,8 @@
       <code>reveal</code>
       <code>reveal</code>
       <code>reveal</code>
+      <code>reveal</code>
+      <code>reveal</code>
     </PossiblyUndefinedMethod>
     <UndefinedClass occurrences="2">
       <code>TestExtension</code>
diff --git a/src/PlatesEngineFactory.php b/src/PlatesEngineFactory.php
index 628fe1f..90be966 100644
--- a/src/PlatesEngineFactory.php
+++ b/src/PlatesEngineFactory.php
@@ -9,6 +9,7 @@
 use Mezzio\Helper;
 use Psr\Container\ContainerInterface;
 
+use function array_replace_recursive;
 use function class_exists;
 use function get_class;
 use function gettype;
@@ -48,7 +49,15 @@ class PlatesEngineFactory
     public function __invoke(ContainerInterface $container): PlatesEngine
     {
         $config = $container->has('config') ? $container->get('config') : [];
-        $config = $config['plates'] ?? [];
+
+        $mezzioConfig = isset($config['templates']) && is_array($config['templates'])
+            ? $config['templates']
+            : [];
+        $platesConfig = isset($config['plates']) && is_array($config['plates'])
+            ? $config['plates']
+            : [];
+
+        $config = array_replace_recursive($mezzioConfig, $platesConfig);
 
         // Create the engine instance:
         $engine = new PlatesEngine();
@@ -60,9 +69,6 @@ public function __invoke(ContainerInterface $container): PlatesEngine
             $this->injectExtensions($container, $engine, $config['extensions']);
         }
 
-        $config = $container->has('config') ? $container->get('config') : [];
-        $config = $config['templates'] ?? [];
-
         // Set file extension
         if (isset($config['extension'])) {
             $engine->setFileExtension($config['extension']);
@@ -138,6 +144,8 @@ private function injectEscaperExtension(ContainerInterface $container, PlatesEng
 
     /**
      * Inject all configured extensions into the engine.
+     *
+     * @param array<ExtensionInterface|string> $extensions
      */
     private function injectExtensions(ContainerInterface $container, PlatesEngine $engine, array $extensions): void
     {
diff --git a/test/PlatesEngineFactoryTest.php b/test/PlatesEngineFactoryTest.php
index 14574c3..69a8a16 100644
--- a/test/PlatesEngineFactoryTest.php
+++ b/test/PlatesEngineFactoryTest.php
@@ -271,6 +271,41 @@ public function testExceptionIsRaisedIfMultiplePathsInSameNamespace(): void
         $factory($this->container->reveal());
     }
 
+    public function testSetExtensionByTemplatesConfig(): void
+    {
+        $config = [
+            'templates' => [
+                'extension' => 'html.twig',
+            ],
+        ];
+        $this->container->has('config')->willReturn(true);
+        $this->container->get('config')->willReturn($config);
+        $factory = new PlatesEngineFactory();
+
+        $engine = $factory($this->container->reveal());
+
+        $this->assertSame('html.twig', $engine->getFileExtension());
+    }
+
+    public function testOverrideExtensionByPlatesConfig(): void
+    {
+        $config = [
+            'templates' => [
+                'extension' => 'html.twig',
+            ],
+            'plates'    => [
+                'extension' => 'plates.php',
+            ],
+        ];
+        $this->container->has('config')->willReturn(true);
+        $this->container->get('config')->willReturn($config);
+        $factory = new PlatesEngineFactory();
+
+        $engine = $factory($this->container->reveal());
+
+        $this->assertSame('plates.php', $engine->getFileExtension());
+    }
+
     public function provideHelpersToUnregister(): array
     {
         return [