diff --git a/attestation/rac/cmd/rahub/main.go b/attestation/rac/cmd/rahub/main.go
index d2c81dd3c1f4887eb97a43a5469f33567d647098..216acbb9ad3ff261628dd5d08ae496bedb7ed5aa 100644
--- a/attestation/rac/cmd/rahub/main.go
+++ b/attestation/rac/cmd/rahub/main.go
@@ -13,6 +13,7 @@ Create: 2021-09-17
 Description: rahub communicates between ras and raagent.
 */
 
+
 // rahub main package.
 package main