diff --git a/pkgs/development/interpreters/python/default.nix b/pkgs/development/interpreters/python/default.nix
index 7800efc8f07d..f80f2f16ccd4 100644
--- a/pkgs/development/interpreters/python/default.nix
+++ b/pkgs/development/interpreters/python/default.nix
@@ -70,10 +70,10 @@ in {
     sourceVersion = {
       major = "3";
       minor = "9";
-      patch = "17";
+      patch = "18";
       suffix = "";
     };
-    hash = "sha256-MM4FfETyg/jtk2Bsy9uNUd1Sa9xMYszl4Nwhe/o+jO4=";
+    hash = "sha256-AVl9sBMsHPezMe/2iuCbWiNaPDyqnJRMKcrH0cTEwAo=";
     inherit (darwin) configd;
     inherit passthruFun;
   };