diff --git a/.travis.yml b/.travis.yml
index 490839b5..9e3f058e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -27,7 +27,7 @@ matrix:
         components:
         - tools
         - platform-tools
-        - build-tools-25.0.0
+        - build-tools-26.0.2
         - android-24
         - extra-android-m2repository
 
diff --git a/build_android/build.gradle b/build_android/build.gradle
index f5e0fc2a..adf5a4d0 100644
--- a/build_android/build.gradle
+++ b/build_android/build.gradle
@@ -7,7 +7,7 @@ buildscript {
 	}
 
 	dependencies {
-		classpath 'com.android.tools.build:gradle:2.3.3'
+		classpath 'com.android.tools.build:gradle:3.0.0'
 	}
 }
 
@@ -36,7 +36,7 @@ android {
 	}
 
 	compileSdkVersion 'android-24'
-	buildToolsVersion '25.0.0'
+	buildToolsVersion '26.0.2'
 
 	defaultConfig {
 		versionCode 40
diff --git a/build_android/gradle/wrapper/gradle-wrapper.properties b/build_android/gradle/wrapper/gradle-wrapper.properties
index 562b5ee5..187d8813 100644
--- a/build_android/gradle/wrapper/gradle-wrapper.properties
+++ b/build_android/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Sun Jun 04 20:10:42 EDT 2017
+#Tue Nov 14 12:31:45 EST 2017
 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-4.1-all.zip