diff --git a/pkgs/development/python-modules/pyGithub/default.nix b/pkgs/development/python-modules/pyGithub/default.nix
index 02656968d682..d0ebca394460 100644
--- a/pkgs/development/python-modules/pyGithub/default.nix
+++ b/pkgs/development/python-modules/pyGithub/default.nix
@@ -11,14 +11,14 @@
 
 buildPythonPackage rec {
   pname = "PyGithub";
-  version = "1.55";
+  version = "1.56";
   disabled = pythonOlder "3.6";
 
   src = fetchFromGitHub {
     owner = "PyGithub";
     repo = "PyGithub";
-    rev = "v${version}";
-    sha256 = "sha256-PuGCBFSbM91NtSzuyf0EQUr3LiuHDq90OwkSf53rSyA=";
+    rev = "refs/tags/v${version}";
+    sha256 = "sha256-L6xrv3dAT/sWt/7ZeDy3P095g7Lpht52LkfCVYNLkbA=";
   };
 
   propagatedBuildInputs = [