diff --git a/.travis.yml b/.travis.yml
index bad2f4e917..8bb6f26241 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,18 +2,14 @@ language: android
 jdk: oraclejdk8
 sudo: false
 
-env:
-  global:
-    - COMPILE_SDK_VERSION = 26
-    - BUILD_TOOLS_VERSION = 26.0.1
-
 android:
   components:
     - tools
     - platform-tools
     - tools
-    - build-tools-$BUILD_TOOLS_VERSION
-    - android-$COMPILE_SDK_VERSION
+    - build-tools-26.0.2
+    - android-26
+    - extra-android-m2repository
 
   licenses:
     - 'android-sdk-license-.+'
diff --git a/app/build.gradle b/app/build.gradle
index 625fe39721..5a79a97552 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -4,8 +4,6 @@ File signPropertiesFile = rootProject.file('sign/keystore.properties')
 
 android {
     compileSdkVersion rootProject.ext.compileSdkVersion
-    buildToolsVersion rootProject.ext.buildToolsVersion
-
     defaultConfig {
         applicationId "com.blankj.androidutilcode"
         minSdkVersion rootProject.ext.minSdkVersion
diff --git a/build.gradle b/build.gradle
index 9ae999ec35..b29e45d0f3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -27,7 +27,6 @@ task clean(type: Delete) {
 ext {
     // Sdk and tools
     compileSdkVersion = 26
-    buildToolsVersion = '26.0.1'
     minSdkVersion = 14
     targetSdkVersion = 22
 
diff --git a/subutil/build.gradle b/subutil/build.gradle
index 14ce72fe28..2acf2b4906 100644
--- a/subutil/build.gradle
+++ b/subutil/build.gradle
@@ -22,8 +22,6 @@ task jacocoTestReport(type: JacocoReport, dependsOn: ['testDebugUnitTest', 'crea
 
 android {
     compileSdkVersion rootProject.ext.compileSdkVersion
-    buildToolsVersion rootProject.ext.buildToolsVersion
-
     defaultConfig {
         minSdkVersion rootProject.ext.minSdkVersion
         versionCode rootProject.ext.versionCode
diff --git a/utilcode/build.gradle b/utilcode/build.gradle
index efd97d2d8a..66a1401eaa 100644
--- a/utilcode/build.gradle
+++ b/utilcode/build.gradle
@@ -22,8 +22,6 @@ task jacocoTestReport(type: JacocoReport, dependsOn: ['testDebugUnitTest', 'crea
 
 android {
     compileSdkVersion rootProject.ext.compileSdkVersion
-    buildToolsVersion rootProject.ext.buildToolsVersion
-
     defaultConfig {
         minSdkVersion rootProject.ext.minSdkVersion
         versionCode rootProject.ext.versionCode