diff --git a/build.gradle b/build.gradle
index 759e3804349069cba3fcecf4768fc956b835e9d3..992e27ffebfd462739b0926238542a5b0ed81de8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -18,6 +18,8 @@ group = 'it.unibz.inf.isochrone'
 version = '0.2-SNAPSHOT'
 
 description = 'PhD project of Nikolaus Krismer'
+sourceCompatibility=1.7
+targetCompatibility=1.7
 
 def getDate() {
 	def date = new Date()