diff --git a/app/build.gradle b/app/build.gradle
index 5ae6fd3..32fedec 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -72,7 +72,7 @@ tasks.whenTaskAdded { task ->
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation "androidx.preference:preference:1.1.0-alpha02"
-    implementation 'com.github.shadowsocks:plugin:1.0.0'
+    implementation 'com.github.shadowsocks:plugin:1.1.0'
     implementation 'com.takisoft.preferencex:preferencex-simplemenu:1.0.0'
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlinVersion"
     testImplementation 'junit:junit:4.12'
diff --git a/app/src/main/java/com/github/shadowsocks/plugin/v2ray/ConfigFragment.kt b/app/src/main/java/com/github/shadowsocks/plugin/v2ray/ConfigFragment.kt
index bbe2d9c..2edd2c3 100644
--- a/app/src/main/java/com/github/shadowsocks/plugin/v2ray/ConfigFragment.kt
+++ b/app/src/main/java/com/github/shadowsocks/plugin/v2ray/ConfigFragment.kt
@@ -42,10 +42,6 @@ class ConfigFragment : PreferenceFragmentCompat(), Preference.OnPreferenceChange
     private val path by lazy { findPreference<EditTextPreference>("path") }
     private val certRaw by lazy { findPreference<EditTextPreference>("certRaw") }
 
-    // todo: remove me for updated plugin lib
-    private fun PluginOptions.putWithDefault(key: String, value: String?, default: String? = null) =
-            if (value == null || value == default) remove(key) else put(key, value)
-
     private fun readMode(value: String = mode.value) = when (value) {
         "websocket-http" -> Pair(null, null)
         "websocket-tls" -> Pair(null, "")
diff --git a/build.gradle b/build.gradle
index e00df37..251e421 100644
--- a/build.gradle
+++ b/build.gradle
@@ -12,7 +12,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.2.1'
+        classpath 'com.android.tools.build:gradle:3.3.0'
         classpath 'com.github.ben-manes:gradle-versions-plugin:0.20.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion"
     }