diff --git a/app/outline/docker-compose.prod.yml b/app/outline/docker-compose.prod.yml
index a8b1f6a..408620d 100644
--- a/app/outline/docker-compose.prod.yml
+++ b/app/outline/docker-compose.prod.yml
@@ -17,6 +17,7 @@ services:
       REDIS_URL: '${REDIS_URL}'
       URL: '${URL}'
       FILE_STORAGE: '${FILE_STORAGE}'
+      FILE_STORAGE_UPLOAD_MAX_SIZE: '262144000'
       AWS_ACCESS_KEY_ID: '${AWS_ACCESS_KEY_ID}'
       AWS_SECRET_ACCESS_KEY: '${AWS_SECRET_ACCESS_KEY}'
       AWS_REGION: '${AWS_REGION}'