diff --git a/app/build.gradle b/app/build.gradle
index 456a1bd6..0f6e5dcd 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -83,7 +83,7 @@ android {
 
 repositories {
     maven { url "https://jitpack.io" }
-//    google()
+    google()
     flatDir {
         dirs 'libs' //aar
     }
@@ -99,6 +99,7 @@ dependencies {
 //    compile "com.android.support:support-annotations:${ANDROID_SUPPORT_VERSION}"
 
     compile "com.android.support:support-v4:${ANDROID_SUPPORT_VERSION}"
+//    compile "com.android.support:support-v13:${ANDROID_SUPPORT_VERSION}"
     compile "com.android.support:appcompat-v7:${ANDROID_SUPPORT_VERSION}"
     compile "com.android.support:recyclerview-v7:${ANDROID_SUPPORT_VERSION}"
     compile "com.android.support:design:${ANDROID_SUPPORT_VERSION}"
diff --git a/gradle.properties b/gradle.properties
index 9ed7edaa..5c2353df 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -17,17 +17,16 @@ android.useDeprecatedNdk=true
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
 
-COMPILE_SDK_VERSION = 26
-BUILD_TOOLS_VERSION = 26.0.2
+COMPILE_SDK_VERSION = 27
+BUILD_TOOLS_VERSION = 27.0.3
 MIN_SDK_VERSION = 21
-TARGET_SDK_VERSION = 26
+TARGET_SDK_VERSION = 27
 
 VERSION_CODE = 21
 VERSION_NAME = 2.3.0
 
 #library
-#ANDROID_SUPPORT_VERSION = 26.1.0
-ANDROID_SUPPORT_VERSION = 25.+
+ANDROID_SUPPORT_VERSION = 27.0.2
 CONSTRAINT_VERSION = 1.0.2
 MULTIDEX_VERSION = 1.0.2
 DATAAUTOACCESS_VERSION = 1.2.8