diff --git a/appengine/flexible/django_cloudsql/requirements.txt b/appengine/flexible/django_cloudsql/requirements.txt
index c19a8e2bed0..c7a0c8f04c5 100644
--- a/appengine/flexible/django_cloudsql/requirements.txt
+++ b/appengine/flexible/django_cloudsql/requirements.txt
@@ -1,4 +1,4 @@
-Django==2.1.5
+Django==2.1.9
 mysqlclient==1.4.1
 wheel==0.32.3
 gunicorn==19.9.0
diff --git a/appengine/flexible/hello_world_django/requirements.txt b/appengine/flexible/hello_world_django/requirements.txt
index 110ee9c2e19..8b9ee990bb0 100644
--- a/appengine/flexible/hello_world_django/requirements.txt
+++ b/appengine/flexible/hello_world_django/requirements.txt
@@ -1,2 +1,2 @@
-Django==2.1.5
+Django==2.1.9
 gunicorn==19.9.0
diff --git a/appengine/standard_python37/django/requirements.txt b/appengine/standard_python37/django/requirements.txt
index 6af98c09acc..a2f23ba6d21 100644
--- a/appengine/standard_python37/django/requirements.txt
+++ b/appengine/standard_python37/django/requirements.txt
@@ -1,2 +1,2 @@
-Django==2.1.5
+Django==2.1.9
 PyMySQL==0.9.3
diff --git a/container_engine/django_tutorial/requirements.txt b/container_engine/django_tutorial/requirements.txt
index c19a8e2bed0..e5ee7f84b20 100644
--- a/container_engine/django_tutorial/requirements.txt
+++ b/container_engine/django_tutorial/requirements.txt
@@ -1,5 +1,7 @@
-Django==2.1.5
-mysqlclient==1.4.1
+Django==2.1.9
+# Uncomment the mysqlclient requirement if you are using MySQL rather than
+# PostgreSQL. You must also have a MySQL client installed in that case.
+#mysqlclient==1.4.1
 wheel==0.32.3
 gunicorn==19.9.0
 psycopg2==2.7.7