diff --git a/requirements-py3.txt b/requirements-py3.txt
index c7419e4e..7b6577f4 100644
--- a/requirements-py3.txt
+++ b/requirements-py3.txt
@@ -86,6 +86,6 @@ Twisted==18.7.0rc1
 urllib3==1.23
 vine==1.1.4
 WebOb==1.8.2
-Werkzeug==0.14.1
+Werkzeug==0.15.3
 wrapt==1.10.11
 zope.interface==4.5.0
diff --git a/requirements.txt b/requirements.txt
index e37589b0..6a0c4688 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -84,6 +84,6 @@ Twisted==17.5.0
 urllib3==1.22
 vine==1.1.4
 WebOb==1.7.3
-Werkzeug==0.12.2
+Werkzeug==0.15.3
 wrapt==1.10.11
 zope.interface==4.4.2