diff --git a/ccp/modules/datashield-compose.yml b/ccp/modules/datashield-compose.yml
index 4b93ac0..616dc03 100644
--- a/ccp/modules/datashield-compose.yml
+++ b/ccp/modules/datashield-compose.yml
@@ -110,6 +110,9 @@ services:
       APP_datashield-connect_KEY: ${DATASHIELD_CONNECT_SECRET}
       APP_token-manager_KEY: ${TOKEN_MANAGER_SECRET}
 
+  # TODO: Allow users of group /DataSHIELD and KEYCLOAK_USER_GROUP at the same time:
+  # Maybe a solution would be (https://oauth2-proxy.github.io/oauth2-proxy/docs/configuration/overview/):
+  # --allowed-groups=/DataSHIELD,KEYCLOAK_USER_GROUP
   oauth2_proxy:
     image: quay.io/oauth2-proxy/oauth2-proxy
     container_name: bridgehead_oauth2_proxy