diff --git a/pkgs/development/interpreters/python/default.nix b/pkgs/development/interpreters/python/default.nix
index 5ce6197655c6..53e73fa79c49 100644
--- a/pkgs/development/interpreters/python/default.nix
+++ b/pkgs/development/interpreters/python/default.nix
@@ -92,9 +92,9 @@
         major = "3";
         minor = "15";
         patch = "0";
-        suffix = "b2";
+        suffix = "b3";
       };
-      hash = "sha256-0U9HSrZ56QvHNLAv9YRHtuyZqCGvYdb/DB2g+G40GnE=";
+      hash = "sha256-apNa4jSmfmVJiUNzsM/rg2EYLQOyFEIyiulZirdCISc=";
       inherit passthruFun;
     };