diff --git a/pkgs/development/python-modules/karton-yaramatcher/default.nix b/pkgs/development/python-modules/karton-yaramatcher/default.nix
index f64ee17f843..ac4a7b05b91 100644
--- a/pkgs/development/python-modules/karton-yaramatcher/default.nix
+++ b/pkgs/development/python-modules/karton-yaramatcher/default.nix
@@ -8,13 +8,13 @@
 
 buildPythonPackage rec {
   pname = "karton-yaramatcher";
-  version = "1.1.0";
+  version = "1.1.1";
 
   src = fetchFromGitHub {
     owner = "CERT-Polska";
     repo = pname;
     rev = "v${version}";
-    sha256 = "0yb9l5z826zli5cpcj234dmjdjha2g1lcwxyvpxm95whkhapc2cf";
+    sha256 = "0mv8v1gk6p21pw9kx6cxr76l6c5fxd3p6dk85cwfzz100h8mdvar";
   };
 
   propagatedBuildInputs = [
@@ -24,7 +24,6 @@ buildPythonPackage rec {
 
   postPatch = ''
     substituteInPlace requirements.txt \
-      --replace "karton-core==4.0.5" "karton-core" \
       --replace "yara-python==4.0.2" "yara-python" \
   '';