diff --git a/pkgs/development/python-modules/z3c-checkversions/default.nix b/pkgs/development/python-modules/z3c-checkversions/default.nix
index 7678b223297c..67c8c016e3f3 100644
--- a/pkgs/development/python-modules/z3c-checkversions/default.nix
+++ b/pkgs/development/python-modules/z3c-checkversions/default.nix
@@ -9,12 +9,12 @@
 
 buildPythonPackage rec {
   pname = "z3c-checkversions";
-  version = "2.0";
+  version = "2.1";
 
   src = fetchPypi {
     inherit version;
     pname = "z3c.checkversions";
-    hash = "sha256-rn4kl8Pn6YNqbE+VD6L8rVBQHkQqXSD47ZIy77+ashE=";
+    hash = "sha256-j5So40SyJf7XfCz3P9YFR/6z94up3LY2/dfEmmIbxAk=";
   };
 
   propagatedBuildInputs = [ zc-buildout ];