diff --git a/pwned_password_server/requirements.txt b/pwned_password_server/requirements.txt
index 1610994..560ca9b 100644
--- a/pwned_password_server/requirements.txt
+++ b/pwned_password_server/requirements.txt
@@ -11,4 +11,4 @@ pyOpenSSL==19.0.0
 six==1.12.0
 SQLAlchemy==1.3.5
 virtualenv==15.1.0
-Werkzeug==0.15.4
+Werkzeug==0.15.5