diff --git a/Chapter09/TestApp/requirements.txt b/Chapter09/TestApp/requirements.txt
index be70dbe..a69014b 100644
--- a/Chapter09/TestApp/requirements.txt
+++ b/Chapter09/TestApp/requirements.txt
@@ -1,7 +1,7 @@
 Flask==1.1.1
 Flask-HTTPAuth==3.3.0
 Flask-SQLAlchemy==2.4.1
-Jinja2==2.10.1
+Jinja2==2.11.3
 MarkupSafe==1.1.1
 Pygments==2.4.2
 SQLAlchemy==1.3.9
diff --git a/Chapter09/requirements.txt b/Chapter09/requirements.txt
index be70dbe..a69014b 100644
--- a/Chapter09/requirements.txt
+++ b/Chapter09/requirements.txt
@@ -1,7 +1,7 @@
 Flask==1.1.1
 Flask-HTTPAuth==3.3.0
 Flask-SQLAlchemy==2.4.1
-Jinja2==2.10.1
+Jinja2==2.11.3
 MarkupSafe==1.1.1
 Pygments==2.4.2
 SQLAlchemy==1.3.9