diff --git a/app/build.gradle b/app/build.gradle
index 1edcc0755..0e6a4fac5 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -149,8 +149,6 @@ dependencies {
 
     //lifecycle
     def lifecycle_version = '2.3.1'
-    //2.3.0 弃用lifecycle-extensions
-    //implementation "androidx.lifecycle:lifecycle-extensions:$lifecycle_version"
     implementation "androidx.lifecycle:lifecycle-common-java8:$lifecycle_version"
 
     //room
diff --git a/build.gradle b/build.gradle
index 7305a5fc4..4054b3c3a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -11,7 +11,7 @@ buildscript {
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:4.2.0'
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.5.0"
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath "de.timfreiheit.resourceplaceholders:placeholders:0.3"
     }
 }
@@ -22,7 +22,6 @@ allprojects {
         maven { url "https://maven.aliyun.com/nexus/content/groups/public/" }
         maven { url "https://jitpack.io" }
         maven { url "https://maven.google.com/" }
-        //maven { url "https://github.com/psiegman/mvn-repo/raw/master/releases" }
     }
 }