diff --git a/pkgs/development/python-modules/guntamatic/default.nix b/pkgs/development/python-modules/guntamatic/default.nix
index 5dc316759a20..cfd49b969f01 100644
--- a/pkgs/development/python-modules/guntamatic/default.nix
+++ b/pkgs/development/python-modules/guntamatic/default.nix
@@ -9,14 +9,14 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "guntamatic";
-  version = "1.9.0";
+  version = "1.9.1";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "JensTimmerman";
     repo = "guntamatic";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-AFqr2+N8uDpeUOvPuFZQbvln1sxWhrJEj31H2DOYX1k=";
+    hash = "sha256-OQpbBdTxbKd2A9AWJOLmoKNmPx3ZXTWqLgwTndDWMuw=";
   };
 
   build-system = [ setuptools ];