diff --git a/build.gradle b/build.gradle
index 48d674e..32022a9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,10 +1,15 @@
 buildscript {
     repositories {
         mavenCentral()
+        maven {
+            url 'https://maven.google.com/'
+            name 'Google'
+        }
+        google()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.1'
+        classpath 'com.android.tools.build:gradle:3.1.2'
         classpath 'com.alexvasilkov:android_sign:0.2'
     }
 }
@@ -17,22 +22,25 @@ repositories {
     maven {
         url "http://4thline.org/m2"
     }
+    maven {
+        url 'https://maven.google.com/'
+        name 'Google'
+    }
 }
 
 dependencies {
-    compile 'com.android.support:appcompat-v7:19.1.+'
-    compile 'com.android.support:mediarouter-v7:19.1.+'
-    compile 'org.fourthline.cling:cling-core:2.1.1'
-    compile 'org.fourthline.cling:cling-support:2.1.1'
-    compile 'org.eclipse.jetty:jetty-server:8.1.8.v20121106'
-    compile 'org.eclipse.jetty:jetty-servlet:8.1.8.v20121106'
-    compile 'org.eclipse.jetty:jetty-client:8.1.8.v20121106'
-    compile 'org.slf4j:slf4j-jdk14:1.6.1'
+    implementation 'com.android.support:appcompat-v7:21.0.3'
+    implementation 'com.android.support:mediarouter-v7:21.0.3'
+    implementation 'org.fourthline.cling:cling-core:2.1.1'
+    implementation 'org.fourthline.cling:cling-support:2.1.1'
+    implementation 'org.eclipse.jetty:jetty-server:8.1.8.v20121106'
+    implementation 'org.eclipse.jetty:jetty-servlet:8.1.8.v20121106'
+    implementation 'org.eclipse.jetty:jetty-client:8.1.8.v20121106'
+    implementation 'org.slf4j:slf4j-jdk14:1.6.1'
 }
 
 android {
-    compileSdkVersion 19
-    buildToolsVersion '25.0.0'
+    compileSdkVersion 21
 
 	// Caused by cling, because they apparently include APIs for other platforms.
 	lintOptions {
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 84dbbf8..8e9a578 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Sun Jun 11 12:46:47 BST 2017
+#Wed Jun 20 13:13:49 BST 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip