diff --git a/AsbCloudDb/Readme.md b/AsbCloudDb/Readme.md
index e68c1b3d..4ff414c6 100644
--- a/AsbCloudDb/Readme.md
+++ b/AsbCloudDb/Readme.md
@@ -16,6 +16,6 @@ dotnet ef migrations remvoe <MigrationName> --project AsbCloudDb
 
  #backup
  ```
-  sudo -u postgres pg_dump -U postgres postgres -W | gzip > 2021-09-27_dump.sql
+  sudo -u postgres pg_dump -U postgres postgres -W | gzip > 2021-09-27_dump.sql.gz
  ```
  
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