diff --git a/pkgs/development/python-modules/gruut/default.nix b/pkgs/development/python-modules/gruut/default.nix
index ccaf7b6f0389..f36c9daa12d8 100644
--- a/pkgs/development/python-modules/gruut/default.nix
+++ b/pkgs/development/python-modules/gruut/default.nix
@@ -36,14 +36,14 @@ let
 in
 buildPythonPackage rec {
   pname = "gruut";
-  version = "2.2.3";
+  version = "2.3.4";
   format = "setuptools";
 
   src = fetchFromGitHub {
     owner = "rhasspy";
     repo = pname;
-    rev = "v${version}";
-    sha256 = "sha256-B5fPUW4YaMzDDXxncfrWwxGdUizuaxnPImNMf1ZZJ/I=";
+    rev = "refs/tags/v${version}";
+    sha256 = "sha256-DD7gnvH9T2R6E19+exWE7Si+XEpfh0Iy5FYbycjgzgM=";
   };
 
   postPatch = ''