diff --git a/build.sbt b/build.sbt
index 9232e1ff..bb6e85ee 100644
--- a/build.sbt
+++ b/build.sbt
@@ -41,7 +41,7 @@ libraryDependencies ++= Seq(
   "com.j256.ormlite" % "ormlite-android" % "5.0",
   "com.twofortyfouram" % "android-plugin-api-for-locale" % "1.0.2",
   "dnsjava" % "dnsjava" % "2.1.7",
-  "eu.chainfire" % "libsuperuser" % "1.0.0.201607041850",
+  "eu.chainfire" % "libsuperuser" % "1.0.0.201608240809",
   "me.dm7.barcodescanner" % "zxing" % "1.9",
   "net.glxn.qrgen" % "android" % "2.0"
 )
diff --git a/src/main/scala/com/github/shadowsocks/ShadowsocksNatService.scala b/src/main/scala/com/github/shadowsocks/ShadowsocksNatService.scala
index 86c181ab..30dcbed6 100644
--- a/src/main/scala/com/github/shadowsocks/ShadowsocksNatService.scala
+++ b/src/main/scala/com/github/shadowsocks/ShadowsocksNatService.scala
@@ -304,23 +304,15 @@ class ShadowsocksNatService extends BaseService {
     su.addCommand((init_sb ++ http_sb).toArray)
   }
 
-  override def startRunner(profile: Profile) = if (su == null) {
+  override def startRunner(profile: Profile) = if (su == null)
     su = new Shell.Builder().useSU().setWantSTDERR(true).setWatchdogTimeout(10).open((_, exitCode, _) =>
       if (exitCode == 0) super.startRunner(profile) else {
         if (su != null) {
-          Log.wtf(TAG, "libsuperuser#55 has been fixed. Please remove the redundant code.")
           su.close()
           su = null
         }
         super.stopRunner(true, getString(R.string.nat_no_root))
       })
-    su.waitForIdle()
-    if (!su.isRunning) {
-      su.close()
-      su = null
-      super.stopRunner(true, getString(R.string.nat_no_root))
-    }
-  }
 
   override def connect() {
     super.connect()