diff --git a/requirements-dev.txt b/requirements-dev.txt
index b1f79d9..50f8943 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -71,4 +71,4 @@ twilio==6.0.0
 uritemplate==3.0.0
 urllib3==1.20
 watchdog==0.8.3
-Werkzeug==0.12.1
+Werkzeug==0.15.3
diff --git a/requirements.txt b/requirements.txt
index 1795537..4263090 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,4 +17,4 @@ pytz==2017.2
 requests==2.13.0
 six==1.10.0
 twilio==6.0.0
-Werkzeug==0.12.1
+Werkzeug==0.15.3