diff --git a/vcr/stubs/aiohttp_stubs/__init__.py b/vcr/stubs/aiohttp_stubs/__init__.py
index 38f337e..489fcf0 100644
--- a/vcr/stubs/aiohttp_stubs/__init__.py
+++ b/vcr/stubs/aiohttp_stubs/__init__.py
@@ -34,7 +34,7 @@ class MockClientResponse(ClientResponse):
     async def read(self):
         return self._body
 
-    async def release(self):
+    def release(self):
         pass