diff --git a/Chapter10/Ch10/server/requirements.txt b/Chapter10/Ch10/server/requirements.txt
index 0ae6787..7dd61c1 100644
--- a/Chapter10/Ch10/server/requirements.txt
+++ b/Chapter10/Ch10/server/requirements.txt
@@ -5,7 +5,7 @@ click==6.7
 Flask==0.12.2
 idna==2.6
 itsdangerous==0.24
-Jinja2==2.10
+Jinja2==2.11.3
 MarkupSafe==1.0
 Pillow==5.0.0
 python-dateutil==2.7.0