diff --git a/pkgs/development/python-modules/flufl/lock.nix b/pkgs/development/python-modules/flufl/lock.nix
index 8f0a68f996d2..0cf5218ddfbc 100644
--- a/pkgs/development/python-modules/flufl/lock.nix
+++ b/pkgs/development/python-modules/flufl/lock.nix
@@ -12,13 +12,13 @@
 
 buildPythonPackage rec {
   pname = "flufl-lock";
-  version = "8.2.0";
+  version = "9.1.0";
   pyproject = true;
 
   src = fetchPypi {
     pname = "flufl_lock";
     inherit version;
-    hash = "sha256-FbMzw1+rGjayI4QAVyWK60zXnw+6+CwUTyPN9s8U1eM=";
+    hash = "sha256-jXPIjKt8mLeSZxApnBFivsfOJT+bnF8KLKgDf58kAjQ=";
   };
 
   build-system = [ hatchling ];