Fixed .travis.yml
diff --git a/.travis.yml b/.travis.yml
index 54d5c81..4f3f4ec 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,8 +8,8 @@
 sudo: required
 env:
   global:
-    - ANDROID_API_LEVEL=26
-    - ANDROID_BUILD_TOOLS_VERSION=26.0.2
+    - ANDROID_API_LEVEL=27
+    - ANDROID_BUILD_TOOLS_VERSION=27.0.3
     - ADB_INSTALL_TIMEOUT=20 # minutes (2 minutes by default)
 
 android: