diff --git a/CHANGELOG.md b/CHANGELOG.md
index 479d008..fdbd223 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,22 @@
 # manUp
 
+## [7.0.0]
+
+- **Breaking change** Separate service into `HttpManUpService` and `FireBaseRemoteConfigManUpService`
+
+  - Extract `HttpManUpService` from `ManUpService` and create `FireBaseRemoteConfigManUpService` to support fetching app config with HTTP and Firebase remote config
+  - Now, the user who use `ManUpService` in previous release
+
+    ```dart
+    ManUpService service = ManUpService('https://example.com/manup.json', client: http.Client());
+    ```
+
+    will need to change to
+
+    ```dart
+    HttpManUpService service = HttpManUpService('https://example.com/manup.json', client: http.Client());
+    ```
+
 ## [6.0.0]
 
 - **Breaking change** Update version check logic
diff --git a/README.md b/README.md
index 1ad8569..d523493 100644
--- a/README.md
+++ b/README.md
@@ -9,11 +9,16 @@ does.
 
 ## Usage
 
-### Remote File
+You can select the method to store and fetch app config file with the following options
 
-You need a hosted json file that contains the version metadata. This _could_ be part of your API. However,
-often the reason for maintenance mode is because your API is down. An s3 bucket may be a safer bet,
-even though it means a little more work in maintaining the file.
+- HTTP (`HttpManUpService`)
+  - you need a hosted json file that contains the version metadata. This _could_ be part of your API. However,
+    often the reason for maintenance mode is because your API is down. An s3 bucket may be a safer bet,
+    even though it means a little more work in maintaining the file.
+- Firebase remote config (`FireBaseRemoteConfigManUpService`)
+  - you need to setup firebase project and remote config, then [Add Firebase to your Flutter app](https://firebase.google.com/docs/flutter/setup?platform=ios).
+
+App config file structure
 
 ```json
 {
@@ -42,13 +47,27 @@ If `"ios"` or `"android"` configurations are omitted, it will treat the device a
 
 ### Using the Service Directly
 
-You can use `ManUpService` directly in your code. As part of your app startup logic, use the service to validate the running version.
+You can use service directly in your code. As part of your app startup logic, use the service to validate the running version.
 
-```dart
-ManUpService service = ManUpService('https://example.com/manup.json', client: http.Client());
-ManUpStatus result = await service.validate();
-service.close();
-```
+- `HttpManUpService`
+
+  ```dart
+  HttpManUpService service = HttpManUpService('https://example.com/manup.json', client: http.Client());
+  ManUpStatus result = await service.validate();
+  service.close();
+  ```
+
+- `FireBaseRemoteConfigManUpService`
+
+  ```dart
+  FireBaseRemoteConfigManUpService service = FireBaseRemoteConfigManUpService(
+      remoteConfig: FirebaseRemoteConfig.instance,
+      // Parameter name (key) in remote config
+      paramName: 'configName',
+    );
+  ManUpStatus result = await service.validate();
+  service.close();
+  ```
 
 `ManUpStatus` will let you know how the version of the app running compares to the metadata:
 
diff --git a/pubspec.yaml b/pubspec.yaml
index efdae7b..277e98f 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: manup
 description: Mandatory update for Flutter Apps that prompts or forces app update by querying a hosted JSON file.
-version: 6.0.0
+version: 7.0.0
 homepage: https://github.com/NextFaze/flutter_manup
 
 environment: