diff --git a/pkgs/development/python-modules/dsmr-parser/default.nix b/pkgs/development/python-modules/dsmr-parser/default.nix
index 883ea432cd22..16d85a93b0cb 100644
--- a/pkgs/development/python-modules/dsmr-parser/default.nix
+++ b/pkgs/development/python-modules/dsmr-parser/default.nix
@@ -12,7 +12,7 @@
 
 buildPythonPackage rec {
   pname = "dsmr-parser";
-  version = "0.34";
+  version = "1.0.0";
   format = "setuptools";
 
   disabled = pythonOlder "3.8";
@@ -20,8 +20,8 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "ndokter";
     repo = "dsmr_parser";
-    rev = "v${version}";
-    sha256 = "sha256-GO+lSgTmFgi/ljt99mteoot+p5BJnGb6ZFky5I3I6Io=";
+    rev = "refs/tags/v${version}";
+    sha256 = "sha256-UjwrlNPnv/iBFiX65tcOZjkdC7gZsJzxxCtPdYTdl6Q=";
   };
 
   propagatedBuildInputs = [