diff --git a/04_pred_maintainance/requirements.txt b/04_pred_maintainance/requirements.txt
index c92b70ca..b76b3422 100644
--- a/04_pred_maintainance/requirements.txt
+++ b/04_pred_maintainance/requirements.txt
@@ -12,7 +12,7 @@ MarkupSafe==0.23
 SQLAlchemy==0.9.7
 Tempita==0.5.2
 WTForms==2.0.1
-Werkzeug==0.9.6
+Werkzeug==0.15.3
 Whoosh==2.6.0
 blinker==1.3
 coverage==3.7.1