diff --git a/.travis.yml b/.travis.yml
index 8d79a24e..db831514 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,4 @@
 language: android
-git:
-  submodules: false
-before_install:
-  - git submodule update --init --recursive
 script:
   - export JAVA_OPTS="-XX:+CMSClassUnloadingEnabled -XX:+HeapDumpOnOutOfMemoryError -Xmx2048m"
   - export TERM=dumb
@@ -12,12 +8,10 @@ script:
 android:
   components:
   - tools
-  - build-tools-25.0.2
-  - android-25
+  - platform-tools
+  - build-tools-27.0.3
+  - android-27
   - extra-android-m2repository
-before_cache:
-  - rm -f $HOME/.gradle/caches/modules-2/modules-2.lock
-cache:
-  directories:
-    - $HOME/.gradle/caches/
-    - $HOME/.gradle/wrapper/
+before_install:
+ - yes | sdkmanager "platforms;android-27"
+
diff --git a/build.gradle b/build.gradle
index 829524c0..1d40c918 100644
--- a/build.gradle
+++ b/build.gradle
@@ -17,21 +17,22 @@
 buildscript {
     repositories {
         jcenter()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.1'
+        classpath 'com.android.tools.build:gradle:3.0.1'
         classpath 'com.github.dcendents:android-maven-gradle-plugin:1.4.1'
     }
 }
 
 allprojects {
     apply plugin: 'idea'
-    ext.androidBuildVersionTools = "25.0.2"
+    ext.androidBuildVersionTools = "27.0.3"
 }
 
-def androidCompileSdk() { return 25 }
+def androidCompileSdk() { return 27 }
 
-def androidTargetSdk() { return 24 }
+def androidTargetSdk() { return 27 }
 
 def androidMinSdk() { return 9 }
 
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index e6e14d99..6a4a18a5 100755
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ 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-4.4.1-all.zip
diff --git a/play-services-api/build.gradle b/play-services-api/build.gradle
index 22155d2d..992b8ac5 100644
--- a/play-services-api/build.gradle
+++ b/play-services-api/build.gradle
@@ -39,15 +39,16 @@ android {
     }
 
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_6
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
     }
 }
 
 dependencies {
-    compile project(':play-services-basement')
-    compile project(':play-services-cast-api')
-    compile project(':play-services-cast-framework-api')
-    compile project(':play-services-iid-api')
-    compile project(':play-services-location-api')
-    compile project(':play-services-wearable-api')
+    api project(':play-services-basement')
+    api project(':play-services-cast-api')
+    api project(':play-services-cast-framework-api')
+    api project(':play-services-iid-api')
+    api project(':play-services-location-api')
+    api project(':play-services-wearable-api')
 }
diff --git a/play-services-basement/build.gradle b/play-services-basement/build.gradle
index e3bdf102..e7c7d82a 100644
--- a/play-services-basement/build.gradle
+++ b/play-services-basement/build.gradle
@@ -44,11 +44,12 @@ android {
     }
 
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_6
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
     }
 }
 
 dependencies {
-    compile 'com.android.support:support-v4:25.3.1'
-    compile 'org.microg:safe-parcel:1.4.0'
+    api 'com.android.support:support-v4:25.3.1'
+    api 'org.microg:safe-parcel:1.4.0'
 }
diff --git a/play-services-cast-api/build.gradle b/play-services-cast-api/build.gradle
index dd3226e5..763e01b6 100644
--- a/play-services-cast-api/build.gradle
+++ b/play-services-cast-api/build.gradle
@@ -39,10 +39,11 @@ android {
     }
 
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_6
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
     }
 }
 
 dependencies {
-    compile project(':play-services-basement')
+    api project(':play-services-basement')
 }
diff --git a/play-services-cast-framework-api/build.gradle b/play-services-cast-framework-api/build.gradle
index dd3226e5..763e01b6 100644
--- a/play-services-cast-framework-api/build.gradle
+++ b/play-services-cast-framework-api/build.gradle
@@ -39,10 +39,11 @@ android {
     }
 
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_6
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
     }
 }
 
 dependencies {
-    compile project(':play-services-basement')
+    api project(':play-services-basement')
 }
diff --git a/play-services-iid-api/build.gradle b/play-services-iid-api/build.gradle
index dd3226e5..763e01b6 100644
--- a/play-services-iid-api/build.gradle
+++ b/play-services-iid-api/build.gradle
@@ -39,10 +39,11 @@ android {
     }
 
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_6
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
     }
 }
 
 dependencies {
-    compile project(':play-services-basement')
+    api project(':play-services-basement')
 }
diff --git a/play-services-location-api/build.gradle b/play-services-location-api/build.gradle
index dd3226e5..763e01b6 100644
--- a/play-services-location-api/build.gradle
+++ b/play-services-location-api/build.gradle
@@ -39,10 +39,11 @@ android {
     }
 
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_6
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
     }
 }
 
 dependencies {
-    compile project(':play-services-basement')
+    api project(':play-services-basement')
 }
diff --git a/play-services-wearable-api/build.gradle b/play-services-wearable-api/build.gradle
index dd3226e5..763e01b6 100644
--- a/play-services-wearable-api/build.gradle
+++ b/play-services-wearable-api/build.gradle
@@ -39,10 +39,11 @@ android {
     }
 
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_6
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
     }
 }
 
 dependencies {
-    compile project(':play-services-basement')
+    api project(':play-services-basement')
 }