diff --git a/crypto/gaes/gaes.go b/crypto/gaes/gaes.go
index 8b6e01d21..4e7e5e4f6 100644
--- a/crypto/gaes/gaes.go
+++ b/crypto/gaes/gaes.go
@@ -16,9 +16,8 @@ import (
 	"github.com/gogf/gf/v2/errors/gerror"
 )
 
-var (
+const (
 	// IVDefaultValue is the default value for IV.
-	// This can be changed globally.
 	IVDefaultValue = "I Love Go Frame!"
 )