diff --git a/pkgs/development/python-modules/pyhaversion/default.nix b/pkgs/development/python-modules/pyhaversion/default.nix
index 751bd79649de..36f4f434469e 100644
--- a/pkgs/development/python-modules/pyhaversion/default.nix
+++ b/pkgs/development/python-modules/pyhaversion/default.nix
@@ -12,7 +12,7 @@
 
 buildPythonPackage rec {
   pname = "pyhaversion";
-  version = "21.10.1";
+  version = "21.10.0";
 
   # Only 3.8.0 and beyond are supported
   disabled = pythonOlder "3.8";
@@ -21,7 +21,7 @@ buildPythonPackage rec {
     owner = "ludeeus";
     repo = pname;
     rev = version;
-    sha256 = "sha256-7J7zzJlevNQb7TpFYuGvsk3EWBgwhmV32xPNSLA/LS4=";
+    sha256 = "sha256-EvVkewFgkfYL6BjmJ/IWeuCyR+0R0ZxI35i9sxKcqxo=";
   };
 
   propagatedBuildInputs = [