diff --git a/playground_flask/requirements.txt b/playground_flask/requirements.txt
index cfcf890..9cd0c63 100644
--- a/playground_flask/requirements.txt
+++ b/playground_flask/requirements.txt
@@ -11,7 +11,7 @@ Mako==0.9.1
 MarkupSafe==0.18
 SQLAlchemy==0.9.9
 WTForms==1.0.5
-Werkzeug==0.10.4
+Werkzeug==0.15.3
 alembic==0.6.2
 blinker==1.3
 itsdangerous==0.23
diff --git a/requirements.txt b/requirements.txt
index 4abdbcb..029e633 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -128,7 +128,7 @@ traitlets==4.0.0
 ujson==1.33
 unicodecsv==0.14.1
 urllib3==1.12
-Werkzeug==0.10.4
+Werkzeug==0.15.3
 wheel==0.26.0
 WTForms==1.0.5
 xlrd==0.9.4