diff --git a/pkgs/development/interpreters/python/default.nix b/pkgs/development/interpreters/python/default.nix
index b748397fa10c..9c61eeb5a1d5 100644
--- a/pkgs/development/interpreters/python/default.nix
+++ b/pkgs/development/interpreters/python/default.nix
@@ -133,10 +133,10 @@ with pkgs;
       sourceVersion = {
         major = "3";
         minor = "9";
-        patch = "8";
+        patch = "9";
         suffix = "";
       };
-      sha256 = "sha256-Z1zgm/I8CYNr8ZabdEsepMGhjDJ4hiZjJSXwhETrrVw=";
+      sha256 = "sha256-BoKMBKVzwHOk5RxCkqJ8G+SuJmIcPtx8+TGEGM47bSc=";
     };
   };