diff --git a/build.gradle b/build.gradle
index a2bc072aa..15ad28705 100644
--- a/build.gradle
+++ b/build.gradle
@@ -14,6 +14,8 @@ subprojects { subproject ->
 
 	apply plugin: 'java'
 
+	sourceCompatibility = 1.8
+
 	repositories {
 		mavenCentral()
 		maven {