diff --git a/unity/ChangeLog.txt b/unity/ChangeLog.txt
index c321c7ff4..cc1a954ab 100644
--- a/unity/ChangeLog.txt
+++ b/unity/ChangeLog.txt
@@ -1,9 +1,14 @@
 Google Mobile Ads Unity Plugin Change Log
 
+*************
+Version 2.3.1
+*************
+- Move IInAppBillingService into its own JAR
+
 *************
 Version 2.3.0
 *************
-- Add support for In-App Purchase house ads on Android.
+- Add support for In-App Purchase house ads on Android
 
 *************
 Version 2.2.1
diff --git a/unity/source/Assets/GoogleMobileAds/Api/AdRequest.cs b/unity/source/Assets/GoogleMobileAds/Api/AdRequest.cs
index d870c2f3c..77c2b9926 100644
--- a/unity/source/Assets/GoogleMobileAds/Api/AdRequest.cs
+++ b/unity/source/Assets/GoogleMobileAds/Api/AdRequest.cs
@@ -6,7 +6,7 @@ namespace GoogleMobileAds.Api
 {
     public class AdRequest
     {
-        public const string Version = "2.3.0";
+        public const string Version = "2.3.1";
         public const string TestDeviceSimulator = "SIMULATOR";
 
         public class Builder
diff --git a/unity/source/plugin-library/billingaidl/.gitignore b/unity/source/plugin-library/billingaidl/.gitignore
new file mode 100644
index 000000000..796b96d1c
--- /dev/null
+++ b/unity/source/plugin-library/billingaidl/.gitignore
@@ -0,0 +1 @@
+/build
diff --git a/unity/source/plugin-library/billingaidl/build.gradle b/unity/source/plugin-library/billingaidl/build.gradle
new file mode 100644
index 000000000..8a07863ff
--- /dev/null
+++ b/unity/source/plugin-library/billingaidl/build.gradle
@@ -0,0 +1,37 @@
+apply plugin: 'com.android.library'
+
+android {
+    compileSdkVersion 22
+    buildToolsVersion "22.0.1"
+
+    defaultConfig {
+        minSdkVersion 9
+        targetSdkVersion 22
+        versionCode 1
+        versionName "1.0"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    compile fileTree(dir: 'libs', include: ['*.jar'])
+    compile 'com.android.support:appcompat-v7:22.1.1'
+}
+
+task clearJar(type: Delete) {
+    delete 'build/libs/billingaidl.jar'
+}
+
+task makeJar(type: Copy) {
+    from('build/intermediates/bundles/release/')
+    into('build/libs/')
+    include('classes.jar')
+    rename ('classes.jar', 'in-app-billing-service-aidl.jar')
+}
+
+makeJar.dependsOn(clearJar, build)
diff --git a/unity/source/plugin-library/billingaidl/proguard-rules.pro b/unity/source/plugin-library/billingaidl/proguard-rules.pro
new file mode 100644
index 000000000..0d28cb60a
--- /dev/null
+++ b/unity/source/plugin-library/billingaidl/proguard-rules.pro
@@ -0,0 +1,17 @@
+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /usr/local/google/home/pavlotsky/Android/Sdk/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
diff --git a/unity/source/plugin-library/billingaidl/src/main/AndroidManifest.xml b/unity/source/plugin-library/billingaidl/src/main/AndroidManifest.xml
new file mode 100644
index 000000000..4ae358d37
--- /dev/null
+++ b/unity/source/plugin-library/billingaidl/src/main/AndroidManifest.xml
@@ -0,0 +1,2 @@
+<manifest package="com.google.unity.billingaidl">
+</manifest>
diff --git a/unity/source/plugin-library/app/src/main/aidl/com/android/vending/billing/IInAppBillingService.aidl b/unity/source/plugin-library/billingaidl/src/main/aidl/com/android/vending/billing/IInAppBillingService.aidl
similarity index 100%
rename from unity/source/plugin-library/app/src/main/aidl/com/android/vending/billing/IInAppBillingService.aidl
rename to unity/source/plugin-library/billingaidl/src/main/aidl/com/android/vending/billing/IInAppBillingService.aidl
diff --git a/unity/source/plugin-library/settings.gradle b/unity/source/plugin-library/settings.gradle
index e7b4def49..d51198ec2 100644
--- a/unity/source/plugin-library/settings.gradle
+++ b/unity/source/plugin-library/settings.gradle
@@ -1 +1 @@
-include ':app'
+include ':app', ':billingaidl'