diff --git a/android-sdk/build.gradle b/android-sdk/build.gradle
index 37c8fd4..a2d3430 100644
--- a/android-sdk/build.gradle
+++ b/android-sdk/build.gradle
@@ -3,9 +3,10 @@ apply plugin: 'com.android.library'
 buildscript {
     repositories {
         jcenter()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.2'
+        classpath 'com.android.tools.build:gradle:3.4.1'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }
diff --git a/android-sdk/gradle/wrapper/gradle-wrapper.properties b/android-sdk/gradle/wrapper/gradle-wrapper.properties
index 9c4fa87..ee301c9 100644
--- a/android-sdk/gradle/wrapper/gradle-wrapper.properties
+++ b/android-sdk/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Sun Sep 09 20:43:09 CST 2018
+#Sun Jun 16 21:13:01 CST 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=http://services.gradle.org/distributions/gradle-4.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.1.1-all.zip