diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 6eb0cfd..0a01ed9 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -2,8 +2,5 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="github.daneren2005.serverproxy">
 
-	<uses-sdk android:targetSdkVersion="19"
-		android:minSdkVersion="8" />
-
     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
 </manifest>
diff --git a/build.gradle b/build.gradle
index 09c607b..e7c67b0 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,26 +1,32 @@
 buildscript {
     repositories {
         jcenter()
+        google()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.3'
+        classpath 'com.android.tools.build:gradle:3.2.1'
     }
 }
 
-apply plugin: 'android-library'
+apply plugin: 'com.android.library'
 
 repositories {
     jcenter()
+    google()
 }
 
 dependencies {
-	compile 'com.android.support:support-v4:18.0.+'
+	implementation 'com.android.support:support-v4:18.0.+'
 }
 
 android {
-    compileSdkVersion 22
-    buildToolsVersion '25.0.0'
+    compileSdkVersion 27
+
+    defaultConfig {
+        targetSdkVersion 26
+        minSdkVersion = 8      
+    }
 
     sourceSets {
         main {
@@ -33,4 +39,29 @@ android {
             assets.srcDirs = ['assets']
         }
     }
+
+    buildTypes {
+        release {
+            minifyEnabled true
+            proguardFiles 'proguard.cfg'
+            zipAlignEnabled true
+        }
+        fix {
+            minifyEnabled true
+            proguardFiles 'proguard.cfg'
+            zipAlignEnabled true
+        }
+    }
+    flavorDimensions "version"
+    productFlavors {
+        floss {
+            // FLOSS build (no proprietary libraries)
+            dimension "version"
+        }
+        google {
+            // FLOSS build + Google libraries
+            // Adds ChromeCast support
+            dimension "version"
+        }
+    }
 }