diff --git a/Chapter15/Exercise15.04/requirements.txt b/Chapter15/Exercise15.04/requirements.txt
index 4e12bec..5bd9d38 100644
--- a/Chapter15/Exercise15.04/requirements.txt
+++ b/Chapter15/Exercise15.04/requirements.txt
@@ -1,6 +1,6 @@
 asgiref==3.2.10
 dj-database-url==0.5.0
-Django==3.1
+Django==3.1.13
 django-configurations==2.2
 django-crispy-forms==1.8.1
 django-debug-toolbar==2.2