diff --git a/kernel/api/setting.go b/kernel/api/setting.go
index 17319fad1..079c07969 100644
--- a/kernel/api/setting.go
+++ b/kernel/api/setting.go
@@ -166,6 +166,12 @@ func setFiletree(c *gin.Context) {
 		}
 	}
 
+	if 1 > fileTree.MaxOpenTabCount {
+		fileTree.MaxOpenTabCount = 12
+	}
+	if 32 < fileTree.MaxOpenTabCount {
+		fileTree.MaxOpenTabCount = 32
+	}
 	model.Conf.FileTree = fileTree
 	model.Conf.Save()