diff --git a/.travis.yml b/.travis.yml
index 7bb1a926..098363f0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,8 +8,10 @@ env:
 android:
   components:
     - tools
-    - build-tools-25.0.0
+    - build-tools-27.0.3
     - platform-tools
+    - tools
+    - android-27
     - android-24
     - android-25
     - extra-android-support
@@ -18,6 +20,11 @@ android:
     - sys-img-armeabi-v7a-android-24
     - sys-img-armeabi-v7a-android-25
 
+  licenses:
+      - 'android-sdk-preview-license-52d11cd2'
+      - 'android-sdk-license-.+'
+      - 'google-gdk-license-.+'
+
 before_script:
   - echo no | android create avd --force -n test -t android-24 --abi armeabi-v7a
   - QEMU_AUDIO_DRV=none emulator -avd test -no-window &
diff --git a/build.gradle b/build.gradle
index ee2ae9d0..4e48fa31 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,9 +1,10 @@
 buildscript {
   repositories {
+    google()
     jcenter()
   }
   dependencies {
-    classpath 'com.android.tools.build:gradle:2.3.3'
+    classpath 'com.android.tools.build:gradle:3.1.3'
   }
 }
 
diff --git a/dexter/build.gradle b/dexter/build.gradle
index 11191f30..6d4d183b 100644
--- a/dexter/build.gradle
+++ b/dexter/build.gradle
@@ -2,12 +2,12 @@ apply plugin: 'com.android.library'
 apply from: 'https://raw.github.com/chrisbanes/gradle-mvn-push/master/gradle-mvn-push.gradle'
 
 android {
-  compileSdkVersion 25
-  buildToolsVersion '25.0.0'
+  compileSdkVersion 27
+  buildToolsVersion '27.0.3'
 
   defaultConfig {
-    minSdkVersion 10
-    targetSdkVersion 25
+    minSdkVersion 14
+    targetSdkVersion 27
     versionCode 1
     versionName "1.0"
     consumerProguardFiles 'proguard-rules.pro'
@@ -25,9 +25,9 @@ android {
 }
 
 dependencies {
-  compile fileTree(dir: 'libs', include: ['*.jar'])
-  compile 'com.android.support:appcompat-v7:25.3.1'
-  compile 'com.android.support:design:25.3.1'
-  testCompile 'junit:junit:4.12'
-  testCompile 'org.mockito:mockito-core:1.9.5'
+  implementation fileTree(dir: 'libs', include: ['*.jar'])
+  implementation 'com.android.support:appcompat-v7:27.1.1'
+  implementation 'com.android.support:design:27.1.1'
+  testImplementation 'junit:junit:4.12'
+  testImplementation 'org.mockito:mockito-core:1.9.5'
 }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 7f031c51..d9972614 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Mon Mar 06 10:14:11 CET 2017
+#Tue Jun 12 13:21:11 AMT 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
diff --git a/sample/build.gradle b/sample/build.gradle
index cb489c34..7c192138 100644
--- a/sample/build.gradle
+++ b/sample/build.gradle
@@ -7,12 +7,12 @@ configurations.all {
 }
 
 android {
-  compileSdkVersion 25
-  buildToolsVersion '25.0.0'
+  compileSdkVersion 27
+  buildToolsVersion '27.0.3'
   defaultConfig {
     applicationId "com.karumi.dexter.sample"
     minSdkVersion 18
-    targetSdkVersion 25
+    targetSdkVersion 27
     versionCode 1
     versionName "1.0"
 
@@ -30,14 +30,15 @@ android {
 }
 
 dependencies {
-  compile fileTree(include: ['*.jar'], dir: 'libs')
-  compile 'com.android.support:appcompat-v7:25.3.1'
-  compile 'com.jakewharton:butterknife:8.6.0'
+  implementation fileTree(include: ['*.jar'], dir: 'libs')
+  implementation 'com.android.support:appcompat-v7:27.1.1'
+  implementation 'com.android.support:design:27.1.1'
+  implementation 'com.jakewharton:butterknife:8.6.0'
   annotationProcessor 'com.jakewharton:butterknife-compiler:8.6.0'
-  compile project(':dexter')
-  androidTestCompile 'com.android.support.test:runner:0.5'
-  androidTestCompile 'com.android.support.test:rules:0.5'
-  androidTestCompile 'org.awaitility:awaitility:3.0.0'
-  androidTestCompile 'org.hamcrest:hamcrest-library:1.3'
-  androidTestCompile 'com.android.support.test:rules:1.0.0'
+  implementation project(':dexter')
+  androidTestImplementation 'com.android.support.test:runner:0.5'
+  androidTestImplementation 'com.android.support.test:rules:0.5'
+  androidTestImplementation 'org.awaitility:awaitility:3.0.0'
+  androidTestImplementation 'org.hamcrest:hamcrest-library:1.3'
+  androidTestImplementation 'com.android.support.test:rules:1.0.0'
 }