diff --git a/book_2/flasktaskr/requirement.txt b/book_2/flasktaskr/requirement.txt
index d6bd097..33ac579 100644
--- a/book_2/flasktaskr/requirement.txt
+++ b/book_2/flasktaskr/requirement.txt
@@ -3,7 +3,7 @@ Flask==1.0.3
 Flask-SQLAlchemy==2.4.0
 Flask-WTF==0.14.2
 itsdangerous==1.1.0
-Jinja2==2.10.1
+Jinja2==2.11.3
 MarkupSafe==1.1.1
 SQLAlchemy==1.3.5
 Werkzeug==0.15.4
diff --git a/book_2/flasktaskr/requirements.txt b/book_2/flasktaskr/requirements.txt
index d6bd097..33ac579 100644
--- a/book_2/flasktaskr/requirements.txt
+++ b/book_2/flasktaskr/requirements.txt
@@ -3,7 +3,7 @@ Flask==1.0.3
 Flask-SQLAlchemy==2.4.0
 Flask-WTF==0.14.2
 itsdangerous==1.1.0
-Jinja2==2.10.1
+Jinja2==2.11.3
 MarkupSafe==1.1.1
 SQLAlchemy==1.3.5
 Werkzeug==0.15.4