diff --git a/crossplane/function/runtime.py b/crossplane/function/runtime.py
index a6e465e..827460a 100644
--- a/crossplane/function/runtime.py
+++ b/crossplane/function/runtime.py
@@ -99,6 +99,7 @@ def serve(
         loop = asyncio.get_event_loop()
     except RuntimeError:
         loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(loop)
 
     server = grpc.aio.server(options=options)