diff --git a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/SettingsActivity.kt b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/SettingsActivity.kt
index c93fae00..5c2350d8 100644
--- a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/SettingsActivity.kt
+++ b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/SettingsActivity.kt
@@ -77,8 +77,10 @@ class SettingsActivity : BaseActivity() {
 
             autoUpdateInterval?.setOnPreferenceChangeListener { _, any ->
                 val nval = any as String
+
+                // It must be greater than 15 minutes because WorkManager couldn't run tasks under 15 minutes intervals
                 autoUpdateInterval?.summary =
-                    if (TextUtils.isEmpty(nval) or (nval.toLong() < 1)) AppConfig.SUBSCRIPTION_DEFAULT_UPDATE_INTERVAL else nval
+                    if (TextUtils.isEmpty(nval) or (nval.toLong() < 15)) AppConfig.SUBSCRIPTION_DEFAULT_UPDATE_INTERVAL else nval
                 configureUpdateTask(nval.toLong())
                 true
             }