diff --git a/docs/start/docker_prod.md b/docs/start/docker_prod.md
index 3a679c3..64ba7b6 100644
--- a/docs/start/docker_prod.md
+++ b/docs/start/docker_prod.md
@@ -74,7 +74,8 @@ InvenTree stores data which is meant to be persistent (e.g. uploaded media files
 
 The first step is to edit the environment variables, located in the `.env` file.
 
-The only *mandatory* change is to define the `INVENTREE_EXT_VOLUME` variable - this must point to a directory *on your local machine* where persistent data is to be stored.
+!!! warning "External Volume"
+    The only *mandatory* change is to define the `INVENTREE_EXT_VOLUME` variable - this must point to a directory *on your local machine* where persistent data is to be stored.
 
 !!! info "Database Credentials"
     You may also wish to change the database username (`INVENTREE_DB_USER`) and password (`INVENTREE_DB_PASSWORD`) from their default values