diff --git a/.env b/.env
index bbaa5ed4..0bf11433 100644
--- a/.env
+++ b/.env
@@ -39,10 +39,12 @@ KC_DB_PASSWORD=Secret123!
 # where <client_id> is the CLIENT_ID in lower case.
 # If an environment variable named <CLIENT_ID>_CLIENT_SECRET is present then this will be used to create 
 # the CLIENT_SECRET for the client. Otherwise a new, random secret will be generated
-CLIENTS=OFF,http://world.openfoodfacts.localhost OPFF,https://world.openpetfoodfacts.org
+# NOTE: Client id's created in this way cannot include hyphens
+CLIENTS=OFF,http://world.openfoodfacts.localhost OPFF,https://world.openpetfoodfacts.org OFF_PRO,http://world.pro.openfoodfacts.localhost
 
-# Generate a specific secret for the OFF client so that this matches the configuration in Product Opener for local development
+# Generate specific secrets for the OFF and OFF_PRO clients so that they match the configuration in Product Opener for local development
 OFF_CLIENT_SECRET=Cf4NdSAjZsNO9HLcuXeuvukzFu00roQa
+OFF_PRO_CLIENT_SECRET=1ILwRhBtNJJDQrHp8lR7yrP9S0N2W7al
 
 # Redis is used to broadcast events when users are registered and deleted.
 REDIS_URL=redis:6379