diff --git a/requirements.txt b/requirements.txt
index 73c5840..c45e987 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ Flask==1.1.1
 idna==2.6
 itsdangerous==0.24
 japanmap==0.0.8
-Jinja2==2.10.1
+Jinja2==2.11.3
 MarkupSafe==1.0
 numpy==1.13.3
 olefile==0.44