diff --git a/chapter1/requirements.txt b/chapter1/requirements.txt
index 758bbda..3132e6e 100644
--- a/chapter1/requirements.txt
+++ b/chapter1/requirements.txt
@@ -60,7 +60,7 @@ ipaddress==1.0.18
 ipython==2.2.0
 ipython-genutils==0.1.0
 ipython-sql==0.3.9
-Jinja2==2.9.5
+Jinja2==2.11.3
 jmespath==0.9.0
 jsonschema==2.3.0
 logilab-common==0.62.1