diff --git a/build.gradle b/build.gradle
index 78254f2..f0a0ba7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,9 +6,13 @@ buildscript {
         maven {
             url "https://oss.sonatype.org/content/repositories/snapshots"
         }
+        maven {
+            url 'https://maven.google.com/'
+            name 'Google'
+        }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.5.0'
+        classpath 'com.android.tools.build:gradle:3.0.1'
     }
 }
 
@@ -25,6 +29,10 @@ allprojects {
         maven {
             url "https://oss.sonatype.org/content/repositories/snapshots"
         }
+        maven {
+            url 'https://maven.google.com/'
+            name 'Google'
+        }
     }
 }
 
diff --git a/demo/build.gradle b/demo/build.gradle
index a7e8080..a181365 100644
--- a/demo/build.gradle
+++ b/demo/build.gradle
@@ -1,11 +1,11 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion '23.0.2'
+    compileSdkVersion 27
+    buildToolsVersion '27.0.3'
     defaultConfig {
-        minSdkVersion 8
-        targetSdkVersion 23
+        minSdkVersion 14
+        targetSdkVersion 27
         versionCode 1
         versionName '1.0'
     }
@@ -20,7 +20,7 @@ android {
 }
 
 dependencies {
-    compile 'com.android.support:appcompat-v7:23.1.1'
+    compile 'com.android.support:appcompat-v7:27.0.2'
     compile fileTree(dir: 'libs', include: ['*.jar'])
     compile project(':library')
 //    compile 'info.hoang8f:android-segmented:1.0.6'
diff --git a/demo/src/main/java/info/hoang8f/mymo/segmented/demo/SampleActivity.java b/demo/src/main/java/info/hoang8f/mymo/segmented/demo/SampleActivity.java
index f8c9e77..c24c3fa 100644
--- a/demo/src/main/java/info/hoang8f/mymo/segmented/demo/SampleActivity.java
+++ b/demo/src/main/java/info/hoang8f/mymo/segmented/demo/SampleActivity.java
@@ -2,7 +2,6 @@
 
 import android.os.Bundle;
 import android.support.v4.app.Fragment;
-import android.support.v7.app.ActionBarActivity;
 import android.support.v7.app.AppCompatActivity;
 import android.view.LayoutInflater;
 import android.view.View;
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index dc1d282..d9b048a 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Tue Apr 07 01:55:54 JST 2015
+#Sun Feb 18 16:59:10 MSK 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.8-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
diff --git a/library/build.gradle b/library/build.gradle
index 66cb39e..a5b3194 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -1,12 +1,12 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.2"
+    compileSdkVersion 27
+    buildToolsVersion "27.0.3"
 
     defaultConfig {
-        minSdkVersion 8
-        targetSdkVersion 23
+        minSdkVersion 14
+        targetSdkVersion 27
         versionCode 1
         versionName "1.0"
     }
@@ -20,7 +20,7 @@ android {
 
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:support-annotations:23.2.0'
+    compile 'com.android.support:support-annotations:27.0.2'
 }
 
 // Used to push in maven