diff --git a/app/build.gradle b/app/build.gradle
index 17154c1..7665c80 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -25,10 +25,6 @@ android {
     applicationVariants.all { variant ->
         variant.resValue "string", "app_id", variant.applicationId
     }
-    compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
-    }
     lintOptions {
         disable 'MissingTranslation'
     }
diff --git a/build.gradle b/build.gradle
index 4d415c4..11803ec 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,7 +4,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.1.3'
+        classpath 'com.android.tools.build:gradle:4.2.1'
         classpath 'org.greenrobot:greendao-gradle-plugin:3.3.0'
     }
 }