diff --git a/.travis.yml b/.travis.yml
index 2e846d2e..47275393 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,7 +12,7 @@ android:
   components:
     - platform-tools
     - tools
-    - build-tools-25.0.3
+    - build-tools-26.0.0
     - android-25
     - extra-android-m2repository
 
diff --git a/app/build.gradle b/app/build.gradle
index 2d2f3475..901fa1c2 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -2,7 +2,7 @@ apply plugin: 'com.android.application'
 
 android {
     compileSdkVersion 25
-    buildToolsVersion "25.0.3"
+    buildToolsVersion "26.0.0"
 
     dependencies {
         compile 'com.android.support:support-annotations:25.3.1'
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index f72beb37..57f11ccf 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 5462cb43..0c3e0c5e 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Sun Jun 11 22:47:00 CEST 2017
+#Sun Jul 09 21:06:24 CEST 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.5-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.0.1-bin.zip
diff --git a/gradlew b/gradlew
index 4453ccea..cccdd3d5 100755
--- a/gradlew
+++ b/gradlew
@@ -33,11 +33,11 @@ DEFAULT_JVM_OPTS=""
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
 
-warn ( ) {
+warn () {
     echo "$*"
 }
 
-die ( ) {
+die () {
     echo
     echo "$*"
     echo
@@ -155,7 +155,7 @@ if $cygwin ; then
 fi
 
 # Escape application args
-save ( ) {
+save () {
     for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
     echo " "
 }
diff --git a/terminal-emulator/build.gradle b/terminal-emulator/build.gradle
index 759c5b8a..63ddeabe 100644
--- a/terminal-emulator/build.gradle
+++ b/terminal-emulator/build.gradle
@@ -18,7 +18,7 @@ ext {
 
 android {
     compileSdkVersion 25
-    buildToolsVersion "25.0.3"
+    buildToolsVersion "26.0.0"
 
     defaultConfig {
         minSdkVersion 21
diff --git a/terminal-view/build.gradle b/terminal-view/build.gradle
index be547fe1..5f2c3674 100644
--- a/terminal-view/build.gradle
+++ b/terminal-view/build.gradle
@@ -18,7 +18,7 @@ ext {
 
 android {
     compileSdkVersion 25
-    buildToolsVersion "25.0.3"
+    buildToolsVersion "26.0.0"
 
     dependencies {
         compile 'com.android.support:support-annotations:25.3.1'