diff --git a/Chapter13/chapter_13/requirements.txt b/Chapter13/chapter_13/requirements.txt
index e1014bf..62f2916 100644
--- a/Chapter13/chapter_13/requirements.txt
+++ b/Chapter13/chapter_13/requirements.txt
@@ -6,5 +6,5 @@ pillow==5.4.0
 simplekml==1.3.1
 tqdm==4.28.1
 unicodecsv==0.14.1
-jinja2==2.10
+jinja2==2.11.3
 lxml==4.3.0