diff --git a/build.gradle b/build.gradle
index 996ec55a..2a9d4ea7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -7,11 +7,13 @@ buildscript {
     repositories {
         jcenter()
         google()
+        maven { url 'https://storage.googleapis.com/r8-releases/raw' }
         maven { url 'https://www.jitpack.io' }
     }
 
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+        classpath 'com.android.tools:r8:2.0.39' // Must be before the Gradle Plugin for Android.
         classpath 'com.android.tools.build:gradle:3.6.1'
         classpath 'com.github.trevjonez.composer-gradle-plugin:plugin:0.13.1'
         classpath 'com.github.ben-manes:gradle-versions-plugin:0.28.0'