diff --git a/pkgs/development/python-modules/pygsl/default.nix b/pkgs/development/python-modules/pygsl/default.nix
index 2549a2d7f497..c8e247f7d2d9 100644
--- a/pkgs/development/python-modules/pygsl/default.nix
+++ b/pkgs/development/python-modules/pygsl/default.nix
@@ -10,14 +10,14 @@
 
 buildPythonPackage rec {
   pname = "pygsl";
-  version = "2.3.4";
+  version = "2.4.0";
   format = "setuptools";
 
   src = fetchFromGitHub {
     owner = "pygsl";
     repo = "pygsl";
-    rev = "refs/tags/v.${version}";
-    hash = "sha256-2TalLKDDoJdKGZHr7eNNvVW8fL7wQJjnZv34LJokfow=";
+    rev = "refs/tags/v${version}";
+    hash = "sha256-7agGgfDUgY6mRry7d38vGGNLJC4dFUniy2M/cnejDDs=";
   };
 
   nativeBuildInputs = [