diff --git a/docker-compose.yml b/docker-compose.yml
index 7c469df4..c544f2ec 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -419,6 +419,7 @@ services:
       build:
         context: ./mssql
       environment:
+        - MSSQL_PID=Express
         - MSSQL_DATABASE=${MSSQL_DATABASE}
         - SA_PASSWORD=${MSSQL_PASSWORD}
         - ACCEPT_EULA=Y