diff --git a/Resources/doc/index.rst b/Resources/doc/index.rst
index 0538183..515b836 100644
--- a/Resources/doc/index.rst
+++ b/Resources/doc/index.rst
@@ -274,7 +274,7 @@ General PHP objects
             return $this->items;
         }
 
-    .. code-block
+    .. code-block::
        @OA\Schema(ref=@Model(type="App\Response\ItemResponse", groups=["Default"])),
 
     It will generate two different component schemas (ItemResponse, ItemResponse2), even though Default and blank are the same. This is by design.