diff --git a/app/build.gradle b/app/build.gradle
index 758f9cf..74ca324 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -16,6 +16,10 @@
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+    compileOptions {
+        targetCompatibility 1.8
+        sourceCompatibility 1.8
+    }
 }
 
 dependencies {