diff --git a/pkgs/development/python-modules/oncalendar/default.nix b/pkgs/development/python-modules/oncalendar/default.nix
index 5b4920a6cef7..f37261a058bd 100644
--- a/pkgs/development/python-modules/oncalendar/default.nix
+++ b/pkgs/development/python-modules/oncalendar/default.nix
@@ -6,13 +6,13 @@
 
 buildPythonPackage rec {
   pname = "oncalendar";
-  version = "1.0";
+  version = "1.1";
 
   src = fetchFromGitHub {
     owner = "cuu508";
     repo = "oncalendar";
     rev = "refs/tags/v${version}";
-    hash = "sha256-eQYxOnL4/TJbY/nijcPl8TqK2MrwcdISKGfZQoI7828=";
+    hash = "sha256-MPKzC2QYA3tWxg19URKheAbPaiS0jXP96xR0Hyl58V0=";
   };
 
   nativeBuildInputs = [ pytestCheckHook ];