diff --git a/version.json b/version.json
index 5cebd3ddd2..e50d633261 100644
--- a/version.json
+++ b/version.json
@@ -10,7 +10,7 @@
             "javascript": "3.21-dev",
             "objectivec": "3.21-dev",
             "php": "3.21-dev",
-            "python": "3.21-dev",
+            "python": "4.21-dev",
             "ruby": "3.21-dev"
         }
     }