diff --git a/pkgs/development/python-modules/elmax-api/default.nix b/pkgs/development/python-modules/elmax-api/default.nix
index 9265e5c9ebe1..49d3b046f13a 100644
--- a/pkgs/development/python-modules/elmax-api/default.nix
+++ b/pkgs/development/python-modules/elmax-api/default.nix
@@ -12,7 +12,7 @@
 
 buildPythonPackage rec {
   pname = "elmax-api";
-  version = "0.0.6.3";
+  version = "0.0.6.4rc0";
   pyproject = true;
 
   disabled = pythonOlder "3.8";
@@ -21,7 +21,7 @@ buildPythonPackage rec {
     owner = "albertogeniola";
     repo = pname;
     tag = "v${version}";
-    hash = "sha256-jnm1AFnPxZIgD815ZFxV/i9ar4cZfsYJ0+xDpM3hKmg=";
+    hash = "sha256-BYVfP8B+p4J4gW+64xh9bT9sDcu/lk0R+MvLsYLwRfQ=";
   };
 
   build-system = [ setuptools ];