diff --git a/sdk/agentserver/azure-ai-agentserver-core/CHANGELOG.md b/sdk/agentserver/azure-ai-agentserver-core/CHANGELOG.md
index fa35b7f66fc5..28a5b12fbead 100644
--- a/sdk/agentserver/azure-ai-agentserver-core/CHANGELOG.md
+++ b/sdk/agentserver/azure-ai-agentserver-core/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Release History
 
+## 2.1.0b3 (Unreleased)
+
+### Features Added
+
+### Breaking Changes
+
+### Bugs Fixed
+
+### Other Changes
+
 ## 2.1.0b2 (2026-08-18)
 
 ### Other Changes
diff --git a/sdk/agentserver/azure-ai-agentserver-core/azure/ai/agentserver/core/_version.py b/sdk/agentserver/azure-ai-agentserver-core/azure/ai/agentserver/core/_version.py
index bfd75595682e..61045c9b08c6 100644
--- a/sdk/agentserver/azure-ai-agentserver-core/azure/ai/agentserver/core/_version.py
+++ b/sdk/agentserver/azure-ai-agentserver-core/azure/ai/agentserver/core/_version.py
@@ -2,4 +2,4 @@
 # Copyright (c) Microsoft Corporation. All rights reserved.
 # ---------------------------------------------------------
 
-VERSION = "2.1.0b2"
+VERSION = "2.1.0b3"