diff --git a/integrations/appengine/webapp_config.yaml b/integrations/appengine/webapp_config.yaml
index 839b6aa94d671b..f27ad7d68b8663 100644
--- a/integrations/appengine/webapp_config.yaml
+++ b/integrations/appengine/webapp_config.yaml
@@ -1,6 +1,4 @@
-runtime: python27
-api_version: 1
-threadsafe: true
+runtime: python39
 handlers:
     - url: /
       static_files: html/index.html