diff --git a/pkgs/development/python-modules/ircstates/default.nix b/pkgs/development/python-modules/ircstates/default.nix
index 857b0358aff..3cd4fb09f90 100644
--- a/pkgs/development/python-modules/ircstates/default.nix
+++ b/pkgs/development/python-modules/ircstates/default.nix
@@ -10,24 +10,16 @@
 
 buildPythonPackage rec {
   pname = "ircstates";
-  version = "0.11.3";
+  version = "0.11.5";
   disabled = pythonOlder "3.6";  # f-strings
 
   src = fetchFromGitHub {
     owner = "jesopo";
     repo = pname;
     rev = "v${version}";
-    sha256 = "1v8r6ma8gzvn5ym3xx9qlb0rc4l67pxr3z8njzk1ffxn1x3mxd3i";
+    sha256 = "1b1py1q02wbp4fmkjvchvazklfqibqd6pb28gdq7dg1bwwwd7vda";
   };
 
-  patches = [
-    (fetchpatch {
-      name = "relax-pendulum-version.patch";
-      url = "https://github.com/jesopo/ircstates/commit/f51f1b689e592020d1c91ccab6c03927aadb9f94.patch";
-      sha256 = "0qbp3b9hlqbbx7b474q1mcgnzzzwcm4g89x26iqgmlgxzmv3y5xp";
-    })
-  ];
-
   propagatedBuildInputs = [
     irctokens
     pendulum