diff --git a/libsuperuser/build.gradle b/libsuperuser/build.gradle
index c3d7d24..137ecb2 100644
--- a/libsuperuser/build.gradle
+++ b/libsuperuser/build.gradle
@@ -22,6 +22,9 @@ android {
             assets.srcDirs = ['assets']
         }
     }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_6
+    }
 }
 
 version = "1.0.0." + (new Date()).format('yyyyMMddHHmm')
diff --git a/libsuperuser_example/build.gradle b/libsuperuser_example/build.gradle
index fc741ea..5bb656b 100644
--- a/libsuperuser_example/build.gradle
+++ b/libsuperuser_example/build.gradle
@@ -24,4 +24,7 @@ android {
             assets.srcDirs = ['assets']
         }
     }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_6
+    }
 }