diff --git a/setting/operation_setting.go b/setting/operation_setting.go
index 9a28e987..4940d0fc 100644
--- a/setting/operation_setting.go
+++ b/setting/operation_setting.go
@@ -23,6 +23,7 @@ func AutomaticDisableKeywordsFromString(s string) {
 	ak := strings.Split(s, "\n")
 	for _, k := range ak {
 		k = strings.TrimSpace(k)
+		k = strings.ToLower(k)
 		if k != "" {
 			AutomaticDisableKeywords = append(AutomaticDisableKeywords, k)
 		}