diff --git a/.buckconfig b/.buckconfig
index a4c6d696ba66b7..0d97d1b1f69fe8 100644
--- a/.buckconfig
+++ b/.buckconfig
@@ -1,6 +1,6 @@
 
 [android]
-  target = android-26
+  target = android-27
 
 [download]
   max_number_of_retries = 3
diff --git a/.circleci/config.yml b/.circleci/config.yml
index e7bfb892a6dd5e..ed652d791485f0 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -28,11 +28,11 @@ aliases:
 
   - &restore-cache-android-packages
     keys:
-      - v1-android-sdkmanager-packages-api-26-alpha-{{ checksum "scripts/.tests.env" }}
+      - v1-android-sdkmanager-packages-api-27-alpha-{{ checksum "scripts/.tests.env" }}
   - &save-cache-android-packages
     paths:
       - /opt/android/sdk
-    key: v1-android-sdkmanager-packages-api-26-alpha-{{ checksum "scripts/.tests.env" }}
+    key: v1-android-sdkmanager-packages-api-27-alpha-{{ checksum "scripts/.tests.env" }}
 
   - &restore-cache-gradle
     keys:
@@ -334,7 +334,7 @@ js_defaults: &js_defaults
 android_defaults: &android_defaults
   <<: *defaults
   docker:
-    - image: circleci/android:api-26-node8-alpha
+    - image: circleci/android:api-27-node8-alpha
   resource_class: "large"
   environment:
     - TERM: "dumb"
diff --git a/ContainerShip/Dockerfile.android-base b/ContainerShip/Dockerfile.android-base
index 5d19bc7f1e9457..6cbc6438c75bdf 100644
--- a/ContainerShip/Dockerfile.android-base
+++ b/ContainerShip/Dockerfile.android-base
@@ -18,8 +18,8 @@ LABEL maintainer="Héctor Ramos <hector@fb.com>"
 
 # set default build arguments
 ARG SDK_VERSION=sdk-tools-linux-3859397.zip
-ARG ANDROID_BUILD_VERSION=26
-ARG ANDROID_TOOLS_VERSION=26.0.3
+ARG ANDROID_BUILD_VERSION=27
+ARG ANDROID_TOOLS_VERSION=27.0.3
 ARG BUCK_VERSION=v2018.07.23.01
 ARG NDK_VERSION=17b
 ARG NODE_VERSION=8.10.0
diff --git a/RNTester/android/app/build.gradle b/RNTester/android/app/build.gradle
index f69c094c17660a..3cacfe0409cb94 100644
--- a/RNTester/android/app/build.gradle
+++ b/RNTester/android/app/build.gradle
@@ -84,8 +84,8 @@ def enableSeparateBuildPerCPUArchitecture = false
 def enableProguardInReleaseBuilds = true
 
 android {
-    compileSdkVersion 26
-    buildToolsVersion "26.0.3"
+    compileSdkVersion 27
+    buildToolsVersion "27.0.3"
 
     defaultConfig {
         applicationId "com.facebook.react.uiapp"
diff --git a/ReactAndroid/build.gradle b/ReactAndroid/build.gradle
index d14674d231e88b..54a139e71fa6a4 100644
--- a/ReactAndroid/build.gradle
+++ b/ReactAndroid/build.gradle
@@ -245,8 +245,8 @@ task packageReactNdkLibsForBuck(dependsOn: packageReactNdkLibs, type: Copy) {
 }
 
 android {
-    compileSdkVersion 26
-    buildToolsVersion "26.0.3"
+    compileSdkVersion 27
+    buildToolsVersion "27.0.3"
 
     defaultConfig {
         minSdkVersion 16
diff --git a/appveyor.yml b/appveyor.yml
index 3d5c4336a652cd..61fe51b3069ac6 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,8 +1,8 @@
 environment:
     ANDROID_HOME: "C:\\android-sdk-windows"
     ANDROID_NDK: "C:\\android-sdk-windows\\android-ndk-r17b"
-    ANDROID_BUILD_VERSION: 26
-    ANDROID_TOOLS_VERSION: 26.0.3
+    ANDROID_BUILD_VERSION: 27
+    ANDROID_TOOLS_VERSION: 27.0.3
 
     GRADLE_OPTS: -Dorg.gradle.daemon=false
 
diff --git a/local-cli/templates/HelloWorld/android/build.gradle b/local-cli/templates/HelloWorld/android/build.gradle
index 116463797c9bbe..8638267d1be79c 100644
--- a/local-cli/templates/HelloWorld/android/build.gradle
+++ b/local-cli/templates/HelloWorld/android/build.gradle
@@ -32,9 +32,9 @@ allprojects {
 }
 
 ext {
-    buildToolsVersion = "26.0.3"
+    buildToolsVersion = "27.0.3"
     minSdkVersion = 16
-    compileSdkVersion = 26
+    compileSdkVersion = 27
     targetSdkVersion = 26
     supportLibVersion = "27.1.1"
 }
diff --git a/scripts/.tests.env b/scripts/.tests.env
index e9d918ec476ec1..17a2ac9e13eaab 100644
--- a/scripts/.tests.env
+++ b/scripts/.tests.env
@@ -4,9 +4,9 @@
 
 ## ANDROID ##
 # Android SDK Build Tools revision
-export ANDROID_SDK_BUILD_TOOLS_REVISION=26.0.3
+export ANDROID_SDK_BUILD_TOOLS_REVISION=27.0.3
 # Android API Level we build with
-export ANDROID_SDK_BUILD_API_LEVEL="26"
+export ANDROID_SDK_BUILD_API_LEVEL="27"
 # Google APIs for Android level
 export ANDROID_GOOGLE_API_LEVEL="23"
 # Minimum Android API Level we target