diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5df234d..fa2a1b1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,29 @@
 # Changelog
 
+## [0.4.0](https://github.com/sdb9696/firebase-messaging/tree/0.4.0) (2024-08-29)
+
+[Full Changelog](https://github.com/sdb9696/firebase-messaging/compare/0.3.0...0.4.0)
+
+**Release highlights:**
+
+- Support for new FCM HTTP v1 API
+- Previous versions of this library will no longer work due firebase [deprecating the legacy APIs](https://firebase.google.com/docs/cloud-messaging/migrate-v1)
+- Dropping official python 3.8 support
+- **Breaking** - this version of the library only supports being run in an asyncio event loop
+- **Breaking** - The api has changed, see the readme for updated details
+
+**Breaking change pull requests:**
+
+- Drop python 3.8 support and update CI [\#5](https://github.com/sdb9696/firebase-messaging/pull/5) (@sdb9696)
+
+**Implemented enhancements:**
+
+- Support FCM HTTP v1 \(async only\) [\#4](https://github.com/sdb9696/firebase-messaging/pull/4) (@sdb9696)
+
+**Project maintenance:**
+
+- Update releasing instructions and add changelog [\#6](https://github.com/sdb9696/firebase-messaging/pull/6) (@sdb9696)
+
 ## [0.3.0](https://github.com/sdb9696/firebase-messaging/tree/0.3.0) (2024-03-26)
 
 [Full Changelog](https://github.com/sdb9696/firebase-messaging/compare/0.2.1...0.3.0)
@@ -79,5 +103,4 @@
 - Fix publish workflow ([447d379](https://github.com/sdb9696/firebase-messaging/commit/447d37922aa2589e79b3952036ef10b02debb01a) by sdb9696).
 
 
-
 \* *This Changelog was automatically generated by [github_changelog_generator](https://github.com/github-changelog-generator/github-changelog-generator)*
diff --git a/README.rst b/README.rst
index a97172c..a2dbf80 100644
--- a/README.rst
+++ b/README.rst
@@ -46,26 +46,34 @@ PyPi::
 Requirements
 ------------
 
-- Firebase sender id to receive notification
-- Firebase serverKey to send notification (optional)
+- Firebase configuration to receive notifications
 
 Usage
 -----
 
+Must be run inside an asyncio event loop.
+
 python::
 
-    from firebase_messaging import FcmPushClient
+    from firebase_messaging import FcmPushClient, FcmRegisterConfig
 
     def on_notification(obj, notification, data_message):
         # Do something with the notification
         pass
 
-    pc = FcmPushClient(None)
-    fcm_token = pc.checkin(sender_id, app_id)
+    credentials = None  # Start off with none or load from previous save
+    def on_credentials_updated(creds):
+        # save the credentials to a file here for future use
+
+    fcm_config = FcmRegisterConfig(fcm-project-id, fcm-app-id, fcm-api-key, fcm-message-sender-id)
+    pc = FcmPushClient(on_notification, fcm_config, credentials, on_credentials_updated)
+    fcm_token = await pc.checkin_or_register()
 
-    # Notify the service you're connecting to of your FCM token
+    await pc.start()
 
-    pc.start(YOUR_NOTIFICATION_CALLBACK)
+    # Adapt the following for your usage
+    while some_condition_to_keep_listening:
+        asyncio.sleep(2)
 
 
 Attribution
diff --git a/RELEASING.md b/RELEASING.md
index 23c0a10..1454e25 100644
--- a/RELEASING.md
+++ b/RELEASING.md
@@ -23,8 +23,8 @@ export NEW_RELEASE=x.x.x
 
 ```bash
 git checkout main
-git fetch upstream main
-git rebase upstream/main
+git fetch origin main
+git rebase origin/main
 git checkout -b release/$NEW_RELEASE
 ```
 
@@ -111,7 +111,7 @@ echo "$RELEASE_NOTES"  # Check the output and copy paste if neccessary
 
 ```bash
 git commit --all --verbose -m "Prepare $NEW_RELEASE"
-git push upstream release/$NEW_RELEASE -u
+git push origin release/$NEW_RELEASE -u
 ```
 
 ### Create a PR for the release, merge it, and re-fetch the main
@@ -133,8 +133,8 @@ gh pr merge --squash --body "$RELEASE_NOTES"
 
 ```bash
 git checkout main
-git fetch upstream main
-git rebase upstream/main
+git fetch origin main
+git rebase origin/main
 ```
 
 ### Create a release tag
@@ -143,7 +143,7 @@ Note, add changelog release notes as the tag commit message so `gh release creat
 
 ```bash
 git tag --annotate $NEW_RELEASE -m "$RELEASE_NOTES"  # to create a signed tag replace --annotate with --sign
-git push upstream $NEW_RELEASE
+git push origin $NEW_RELEASE
 ```
 
 ### Create release
diff --git a/pyproject.toml b/pyproject.toml
index f1d2d84..3c45582 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "firebase-messaging"
-version = "0.3.0"
+version = "0.4.0"
 description = "FCM/GCM push notification client"
 authors = ["sdb9696 <steven.beth@gmail.com>"]
 license = "MIT"