diff --git a/requirements-dev.txt b/requirements-dev.txt
index b1f79d9..4d23c7d 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -29,7 +29,7 @@ idna==2.5
 imagesize==0.7.1
 ipaddress==1.0.18
 itsdangerous==0.24
-Jinja2==2.9.6
+Jinja2==2.11.3
 livereload==2.5.1
 MarkupSafe==1.0
 mock==2.0.0
diff --git a/requirements.txt b/requirements.txt
index 1795537..d484dc5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ Flask==0.12.1
 Flask-SocketIO==2.8.6
 future==0.16.0
 itsdangerous==0.24
-Jinja2==2.9.6
+Jinja2==2.11.3
 MarkupSafe==1.0
 packaging==16.8
 parsedatetime==2.3