diff --git a/README.md b/README.md
index 807d2662..a113dada 100644
--- a/README.md
+++ b/README.md
@@ -93,6 +93,7 @@ BUS_API_URL=FOO
 BUS_CLIENT_ID=FOO
 CREATE_DONOR_CASES_CLOUD_FUNCTION_URL=<cloud-function-url>
 ```
+**NB** DQS environment variables for sandboxes can be found within GCP > App Engine > Versions > DQS service > Config
 
 Install the project dependencies: