diff --git a/requirements.txt b/requirements.txt
index 82468c0..3d3e6ce 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,4 +10,4 @@ py==1.4.33
 pyparsing==2.2.0
 pytest==3.0.7
 six==1.10.0
-Werkzeug==0.12.1
+Werkzeug==0.15.5