diff --git a/build.gradle b/build.gradle
index 7f5a93b27c513a84482ac4890f0b09aa3e99bcd7..bb9729c9f8bc132dbf1ae4856afae540b3fc2b8f 100644
--- a/build.gradle
+++ b/build.gradle
@@ -8,7 +8,7 @@ group = 'com.example'
 version = '0.0.1-SNAPSHOT'
 
 java {
-	sourceCompatibility = '11'
+	sourceCompatibility = '8'
 }
 
 repositories {