diff --git a/fern/changelog.mdx b/fern/changelog.mdx
index 7d67ca2..c7c6011 100644
--- a/fern/changelog.mdx
+++ b/fern/changelog.mdx
@@ -4,11 +4,35 @@ subtitle: New features, improvements, and fixes every few days
 slug: changelog
 ---
 
-# November 14 to November 15, 2024
+# November 21 to November 22, 2024
+1. **Support for 'uaenorth' Region in Azure OpenAI Credentials**: When configuring Azure OpenAI credentials, you can now set `region` to use the UAE North region by specifying `'uaenorth'`.
 
-1. **New Voices for `gpt-4o-realtime-preview-2024-10-01`**: You can now use new voice IDs: `ash`, `ballad`, `coral`, `sage`, and `verse` with the `voiceId` parameter when configuring `OpenAIVoice`. Please note that these voices are only available with the `gpt-4o-realtime-preview-2024-10-01` model.
+
+# November 15 to November 21, 2024
+1. **Voice Fallback Plan**: You can now define a `fallbackPlan` in your assistant's voice settings in `assistant.voice.fallbackPlan` or `call.squad.members.assistant.voice.fallbackPlan` to specify alternative voices if your primary voice provider fails.
+
+2. **AssemblyAI Credential Management**: You can now specify your AssemblyAI API keys in the updated "Transcriber Providers" page. Create your API key in the [AssemblyAI dashboard](https://www.assemblyai.com/app/account). AssemblyAI errors are now surfaced in the `endedReason` of `Call`, `ServerMessageEndOfCallReport`, and `ServerMessageStatusUpdate`.
+
+  <Frame caption="Specify AssemblyAI API keys in the Transcriber Providers page">
+    <img src="./static/images/changelog/assembly-ai.png" />
+  </Frame>
+
+3. **Enhanced BYO SIP Trunk Configuration**: When configuring BYO SIP trunk credentials, you can now specify a `techPrefix` for outbound SIP calls and enable `sipDiversionHeader` for authenticating the calling number (if supported). Refer to the `ByoSipTrunkCredential` schema in the [API reference](https://api.vapi.ai/api) to learn more.
+
+  <Frame caption="Learn more about `techPrefix` and `sipDiversionHeader` in the BYO SIP Trunk Credential schema: https://api.vapi.ai/api">
+    <img src="./static/images/changelog/byosiptrunkcredential.png" />
+  </Frame>
+
+4. **File Name Length Constraints**: The maximum file `name` length has been reduced from 100 to 40 characters. The required minimum length is still 1 character. 
+
+5. **Increased Server Timeout Limit**: The maximum value of `server.timeoutSeconds` has increased from 60 to 120 seconds, allowing longer timeouts for server responses.
+
+7. **Extended Delay for Tool Messages**: The `timingMilliseconds` maximum in `ToolMessageDelayed` has increased from 20,000 to 120,000 milliseconds, enabling a longer delay for tool messages.
 
 <AccordionGroup>
+  <Accordion title="November 14 to November 15, 2024">
+    1. **New Voices for `gpt-4o-realtime-preview-2024-10-01`**: You can now use new voice IDs: `ash`, `ballad`, `coral`, `sage`, and `verse` with the `voiceId` parameter when configuring `OpenAIVoice`. Please note that these voices are only available with the `gpt-4o-realtime-preview-2024-10-01` model.
+  </Accordion>
   <Accordion title="November 11 to November 14, 2024">
     1. **Langfuse Credential Management**: You can now send traces to Langfuse by providing your "Secret Key", "Public Key", and "Host URL" for better telemetry monitoring. Create and update these credentials in the [updated Provider Credentials page](https://dashboard.vapi.ai/keys), under `Observability Providers`.