diff --git a/pkgs/development/python-modules/werkzeug/default.nix b/pkgs/development/python-modules/werkzeug/default.nix
index 9b5e3f9ca5f..3eeff377845 100644
--- a/pkgs/development/python-modules/werkzeug/default.nix
+++ b/pkgs/development/python-modules/werkzeug/default.nix
@@ -4,11 +4,11 @@
 
 buildPythonPackage rec {
   pname = "Werkzeug";
-  version = "0.15.2";
+  version = "0.15.4";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0a73e8bb2ff2feecfc5d56e6f458f5b99290ef34f565ffb2665801ff7de6af7a";
+    sha256 = "a0b915f0815982fb2a09161cb8f31708052d0951c3ba433ccc5e1aa276507ca6";
   };
 
   propagatedBuildInputs = [ itsdangerous ];