diff --git a/container_a/requirements.txt b/container_a/requirements.txt
index 04dc0d8..b0f7399 100644
--- a/container_a/requirements.txt
+++ b/container_a/requirements.txt
@@ -8,4 +8,4 @@ Jinja2==2.9.6
 MarkupSafe==1.0
 requests==2.18.1
 urllib3==1.21.1
-Werkzeug==0.12.2
+Werkzeug==0.15.3