diff --git a/.travis.yml b/.travis.yml
index fd5d461..b32f7ea 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,14 +13,14 @@ jdk:
 - oraclejdk8
 
 before_install:
-- openssl aes-256-cbc -K $encrypted_fe6e969707e0_key -iv $encrypted_fe6e969707e0_iv
-  -in yun.jks.enc -out yun.jks -d
+- openssl aes-256-cbc -K $encrypted_fe6e969707e0_key -iv $encrypted_fe6e969707e0_iv -in yun.jks.enc -out yun.jks -d
+- openssl aes-256-cbc -K $encrypted_f4baf1fb5ebf_key -iv $encrypted_f4baf1fb5ebf_iv -in play.json.enc -out play.json -d
 - chmod +x gradlew
 - gem install fir-cli
 - yes | sdkmanager "platforms;android-27"
 
 script:
-- "./gradlew assembleReleaseGitHub"
+- ./gradlew assembleReleaseGitHub
 
 deploy:
   provider: releases
@@ -32,6 +32,7 @@ deploy:
   on:
     tags: true
 
-after_script:
+after_deploy:
 - fir login $fir_token
 - fir p app/build/outputs/apk/releaseGitHub/app-releaseGitHub.apk -c "$TRAVIS_COMMIT_MESSAGE"
+- ./gradlew publishApkReleaseGitHub
diff --git a/README.md b/README.md
index 29798bb..a9ec90d 100644
--- a/README.md
+++ b/README.md
@@ -9,10 +9,12 @@ BJUT Wi-Fi client for Android.
 
 **Warning:** This is an experimental app.
 
+<a href="https://play.google.com/store/apps/details?id=me.liuyun.bjutlgn"><img src="https://play.google.com/intl/en_us/badges/images/generic/en-play-badge.png" height="48"></a>
+
 ## Install
 See [Releases](https://github.com/yunv/BJUTWiFi/releases). 
 
-Only Android 8.1 and later is supported. If you are using older versions, go to [BJUTLoginApp](https://github.com/ZeroGoYoosee/BJUTLoginApp/).
+Only Android 7.1 and later is supported. If you are using older versions, go to [BJUTLoginApp](https://github.com/ZeroGoYoosee/BJUTLoginApp/).
 
 ## Screenshot
 <img src="https://github.com/yunv/BJUTWiFi/blob/master/art/0.png" width="540px">
diff --git a/app/build.gradle b/app/build.gradle
index bb8c52a..980749e 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -3,6 +3,7 @@ plugins {
     id 'org.jetbrains.kotlin.android'
     id 'org.jetbrains.kotlin.android.extensions'
     id 'org.jetbrains.kotlin.kapt'
+    id 'com.github.triplet.play'
 }
 
 def gitCommitCount = "git rev-list HEAD --count".execute().text.trim()
@@ -19,17 +20,26 @@ android {
             keyPassword System.getenv("KEY_PASSWORD")
         }
     }
+    playAccountConfigs {
+        defaultAccountConfig {
+            jsonFile = file('../play.json')
+        }
+    }
     defaultConfig {
         applicationId "me.liuyun.bjutlgn"
-        minSdkVersion 27
+        minSdkVersion 25
         targetSdkVersion 27
-        versionCode 9
-        versionName "9.0.0"
+        versionCode gitCommitCount.toInteger()
+        versionName "10.0.0"
         versionNameSuffix = " (${gitCommitCount})"
         resConfigs "en", "zh-rCN"
+        manifestPlaceholders = [app_name: "@string/app_name"]
+        playAccountConfig = playAccountConfigs.defaultAccountConfig
     }
     buildTypes {
         debug {
+            applicationIdSuffix ".debug"
+            manifestPlaceholders = [app_name: "@string/app_name_debug"]
             signingConfig signingConfigs.release
         }
         release {
@@ -43,10 +53,17 @@ android {
             shrinkResources true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
             signingConfig signingConfigs.github
+            play {
+                track = 'beta'
+                userFraction = 1.0
+                untrackOld = true
+            }
         }
     }
-    dataBinding {
-        // enabled = true
+    packagingOptions {
+        exclude 'kotlin/**'
+        exclude 'META-INF/*.kotlin_module'
+        exclude 'META-INF/*.version'
     }
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
diff --git a/build.gradle b/build.gradle
index d6beeca..036eecb 100644
--- a/build.gradle
+++ b/build.gradle
@@ -13,6 +13,7 @@ buildscript {
     dependencies {
         classpath 'com.android.tools.build:gradle:3.1.0-rc03'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+        classpath 'com.github.triplet.gradle:play-publisher:1.2.0'
     }
 }
 
diff --git a/play.json.enc b/play.json.enc
new file mode 100644
index 0000000..9d32fcd
Binary files /dev/null and b/play.json.enc differ