diff --git a/pkgs/tools/security/crlfsuite/default.nix b/pkgs/tools/security/crlfsuite/default.nix
index 67ccacb2de7..79e69896e30 100644
--- a/pkgs/tools/security/crlfsuite/default.nix
+++ b/pkgs/tools/security/crlfsuite/default.nix
@@ -5,14 +5,14 @@
 
 python3.pkgs.buildPythonApplication rec {
   pname = "crlfsuite";
-  version = "2.0";
+  version = "2.1.1";
   format = "setuptools";
 
   src = fetchFromGitHub {
     owner = "Nefcore";
     repo = "CRLFsuite";
-    rev = "v${version}";
-    sha256 = "sha256-V/EaOtGDPJQAMu9akOtZN5LKLFd3EQkjn79q7ubV0Mc=";
+    rev = "refs/tags/v${version}";
+    sha256 = "sha256-wWXqeQ6rq4yMG1V9f9JGE91Se8VuU8gpahmYyNTtkmo=";
   };
 
   propagatedBuildInputs = with python3.pkgs; [