diff --git a/pkgs/development/python-modules/gcal-sync/default.nix b/pkgs/development/python-modules/gcal-sync/default.nix
index eec5d27a2d31..ed42e3561141 100644
--- a/pkgs/development/python-modules/gcal-sync/default.nix
+++ b/pkgs/development/python-modules/gcal-sync/default.nix
@@ -13,7 +13,7 @@
 
 buildPythonPackage rec {
   pname = "gcal-sync";
-  version = "4.2.0";
+  version = "4.2.1";
   format = "setuptools";
 
   disabled = pythonOlder "3.9";
@@ -22,7 +22,7 @@ buildPythonPackage rec {
     owner = "allenporter";
     repo = "gcal_sync";
     rev = "refs/tags/${version}";
-    hash = "sha256-Z5XRyhObREj38BWnexQnwHS1y2Ewyv5/KPkl/ybHvUE=";
+    hash = "sha256-+ysm3THUet2gKHyVq0QoOxDem7ik4BK7bxVos9thExM=";
   };
 
   propagatedBuildInputs = [