diff --git a/requirements.txt b/requirements.txt
index 28b4746..75f787f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -23,4 +23,4 @@ six==1.11.0
 testresources==2.0.1
 versioneer==0.18
 wadllib==1.3.3
-Werkzeug==0.15.2
+Werkzeug==0.15.3
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 44c9513..28c580f 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -67,4 +67,4 @@ virtualenv==16.4.3
 wadllib==1.3.3
 watchdog==0.9.0
 webencodings==0.5.1
-Werkzeug==0.15.2
+Werkzeug==0.15.3