diff --git a/.gitignore b/.gitignore
index 7b7a6cd..d3e6078 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
+/build/
+*/build/*
 # Compiled class file
 *.class
 .DS_Store
diff --git a/build.gradle b/build.gradle
index e9e1a01..627dbc1 100644
--- a/build.gradle
+++ b/build.gradle
@@ -21,6 +21,7 @@ sourceSets {
         }
     }
 }
+sourceCompatibility = 1.8
 
 dependencies {
     api project(":gmhelper")