diff --git a/pkgs/development/tools/misc/whatstyle/default.nix b/pkgs/development/tools/misc/whatstyle/default.nix
index ca9839c2fedf..07c78d872452 100644
--- a/pkgs/development/tools/misc/whatstyle/default.nix
+++ b/pkgs/development/tools/misc/whatstyle/default.nix
@@ -18,8 +18,8 @@ python3.pkgs.buildPythonApplication rec {
 
   # Fix references to previous version, to avoid confusion:
   postPatch = ''
-    substituteInPlace setup.py --replace-fail 0.1.6 ${version}
-    substituteInPlace whatstyle.py --replace-fail 0.1.6 ${version}
+    substituteInPlace setup.py --replace-fail 0.1.9 ${version}
+    substituteInPlace whatstyle.py --replace-fail 0.1.9 ${version}
   '';
 
   nativeCheckInputs = [