diff --git a/v2rayN/v2rayN/Forms/OptionSettingForm.cs b/v2rayN/v2rayN/Forms/OptionSettingForm.cs
index 4e02b5be..9d6502ed 100644
--- a/v2rayN/v2rayN/Forms/OptionSettingForm.cs
+++ b/v2rayN/v2rayN/Forms/OptionSettingForm.cs
@@ -290,6 +290,10 @@ namespace v2rayN.Forms
             bool lastEnableStatistics = config.enableStatistics;
             config.enableStatistics = chkEnableStatistics.Checked;
             config.statisticsFreshRate = Convert.ToInt32(numStatisticsFreshRate.Value);
+            if (config.statisticsFreshRate > 100 || config.statisticsFreshRate < 1)
+            {
+                config.statisticsFreshRate = 1;
+            }
 
             config.keepOlderDedupl = chkKeepOlderDedupl.Checked;
 
diff --git a/v2rayN/v2rayN/Handler/ConfigHandler.cs b/v2rayN/v2rayN/Handler/ConfigHandler.cs
index 3c136f88..7fc1a687 100644
--- a/v2rayN/v2rayN/Handler/ConfigHandler.cs
+++ b/v2rayN/v2rayN/Handler/ConfigHandler.cs
@@ -156,7 +156,7 @@ namespace v2rayN.Handler
             {
                 config.groupItem = new List<GroupItem>();
             }
-            if (config.statisticsFreshRate > 100)
+            if (config.statisticsFreshRate > 100 || config.statisticsFreshRate < 1)
             {
                 config.statisticsFreshRate = 1;
             }