diff --git a/requirements.txt b/requirements.txt
index 620dbe1..935ad77 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,6 +18,6 @@ snowballstemmer==1.2.1
 Sphinx==1.3.5
 Sphinx-PyPI-upload==0.2.1
 sphinx-rtd-theme==0.1.9
-Werkzeug==0.11.4
+Werkzeug==0.15.3
 wheel==0.24.0
 decorator==4.0.9