diff --git a/gradle.properties b/gradle.properties
index c13226c1..83f4a3d3 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -3,3 +3,6 @@ version       = 0.2.9
 groovyVersion = 2.4.15
 slf4jVersion  = 1.7.25
 spockVersion  = 1.1-groovy-2.4
+
+sourceCompatibility=1.8
+targetCompatibility=1.8