diff --git a/pkgs/development/interpreters/python/default.nix b/pkgs/development/interpreters/python/default.nix
index 2bc80e5df118..d1ac795c472f 100644
--- a/pkgs/development/interpreters/python/default.nix
+++ b/pkgs/development/interpreters/python/default.nix
@@ -104,9 +104,9 @@
         major = "3";
         minor = "15";
         patch = "0";
-        suffix = "a2";
+        suffix = "a3";
       };
-      hash = "sha256-2KCi9Kfz1wkM8ZXoGBTv6V9wVUlVVX9A4UnYaUpmJ1E=";
+      hash = "sha256-arAs2sJFBXeYd7sdkYlDLWfpDd8qm4t7Nz6tVKwHtgc=";
       inherit passthruFun;
     };