diff --git a/telephony/venv_requirements/requirements.txt b/telephony/venv_requirements/requirements.txt
index efd1760..9546aab 100644
--- a/telephony/venv_requirements/requirements.txt
+++ b/telephony/venv_requirements/requirements.txt
@@ -63,7 +63,7 @@ tzlocal==1.3
 UgliPyJS==0.2.5
 validators==0.10.3
 webassets==0.9
-Werkzeug==0.9.3
+Werkzeug==0.15.3
 WTForms==1.0.4
 WTForms-Alchemy==0.7.12
 WTForms-Components==0.10.0