diff --git a/kotlin-asyncapi-ktor/src/main/kotlin/com/asyncapi/kotlinasyncapi/ktor/AsyncApiModule.kt b/kotlin-asyncapi-ktor/src/main/kotlin/com/asyncapi/kotlinasyncapi/ktor/AsyncApiModule.kt
index 2ddd5e26..c6aed034 100644
--- a/kotlin-asyncapi-ktor/src/main/kotlin/com/asyncapi/kotlinasyncapi/ktor/AsyncApiModule.kt
+++ b/kotlin-asyncapi-ktor/src/main/kotlin/com/asyncapi/kotlinasyncapi/ktor/AsyncApiModule.kt
@@ -23,6 +23,7 @@ import com.asyncapi.kotlinasyncapi.context.service.AsyncApiSerializer
 import com.asyncapi.kotlinasyncapi.context.service.AsyncApiService
 import com.asyncapi.kotlinasyncapi.context.service.DefaultAsyncApiSerializer
 import com.asyncapi.kotlinasyncapi.context.service.DefaultAsyncApiService
+import com.asyncapi.kotlinasyncapi.model.AsyncApi
 
 class AsyncApiModule(
     environment: ApplicationEnvironment,
@@ -69,8 +70,19 @@ class AsyncApiModule(
         )
     }
 
-    private val asyncApiAnnotationExtension =
-        annotationProvider.asyncApi?.let { AsyncApiExtension.from(order = -1, it) }
+    private val asyncApiAnnotationExtension: AsyncApiExtension =
+        object : AsyncApiExtension {
+            override val order: Int = -1
+            private var delegate: AsyncApiExtension? = null
+
+            override fun extend(asyncApi: AsyncApi): AsyncApi {
+                val annotated = annotationProvider.asyncApi ?: return asyncApi
+                val extension = delegate ?: AsyncApiExtension.from(order = order, resource = annotated).also {
+                    delegate = it
+                }
+                return extension.extend(asyncApi)
+            }
+        }
 
     private val scriptResourceProvider =
         runCatching {