diff --git a/build.gradle b/build.gradle
index 170d1ac..a759d2b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,6 +1,7 @@
 apply plugin: 'java'
 
-sourceCompatibility = 1.5
+sourceCompatibility = 1.7
+targetCompatibility = 1.7
 version = '1.0'
 
 task wrapper(type: Wrapper) {