diff --git a/.travis.yml b/.travis.yml
index 212b474cc..85446871c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -34,7 +34,6 @@ android:
     - 'google-gdk-license-.+'
 
 before_install:
-  - yes | sdkmanager "platforms;android-26"
   - yes | sdkmanager "platforms;android-27"
   - mkdir -p "$ANDROID_HOME/licenses"
   - echo -e "\n8933bad161af4178b1185d1a37fbf41ea5269c55" > "$ANDROID_HOME/licenses/android-sdk-license"
diff --git a/otr4jandroid/build.gradle b/otr4jandroid/build.gradle
index 77bfd55f5..864821cf4 100644
--- a/otr4jandroid/build.gradle
+++ b/otr4jandroid/build.gradle
@@ -20,7 +20,7 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
-    buildToolsVersion '26.0.2'
+    buildToolsVersion '27.0.3'
 }
 
 dependencies {