diff --git a/app-android/app/build.gradle b/app-android/app/build.gradle
index 190f87b..ac6a62e 100644
--- a/app-android/app/build.gradle
+++ b/app-android/app/build.gradle
@@ -2,7 +2,7 @@ apply plugin: 'com.android.application'
 
 android {
     compileSdkVersion 23
-    buildToolsVersion "23.0.2"
+    buildToolsVersion '26.0.2'
 
     defaultConfig {
         applicationId "at.bitfire.gfxtablet"
diff --git a/app-android/build.gradle b/app-android/build.gradle
index 8874234..b11d9ff 100644
--- a/app-android/build.gradle
+++ b/app-android/build.gradle
@@ -4,7 +4,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.3'
+        classpath 'com.android.tools.build:gradle:3.0.0'
     }
 }
 allprojects {
diff --git a/app-android/gradle/wrapper/gradle-wrapper.properties b/app-android/gradle/wrapper/gradle-wrapper.properties
index 74ef61c..3797f0d 100644
--- a/app-android/gradle/wrapper/gradle-wrapper.properties
+++ b/app-android/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Tue Feb 21 12:16:03 CET 2017
+#Tue Nov 14 11:24:09 CET 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip