diff --git a/build.gradle b/build.gradle
index 607b2ec..d437aca 100644
--- a/build.gradle
+++ b/build.gradle
@@ -23,10 +23,8 @@ version = dexlib2Version + multidexlib2VersionSuffix
 ext.mainArtifact = 'multidexlib2'
 ext.artifactName = mainArtifact
 
-sourceCompatibility = '1.7'
-def jdk = findProperty('JDK7_HOME') as String ?: '/usr/lib/jvm/java-7-openjdk-amd64'
-def jdk_rt = new File(jdk, 'jre/lib/rt.jar')
-if (jdk_rt.exists()) compileJava.options.bootstrapClasspath = files(jdk_rt)
+sourceCompatibility = JavaVersion.VERSION_1_8
+targetCompatibility = JavaVersion.VERSION_1_8
 
 repositories {
     jcenter()