diff --git a/changelog.md b/changelog.md
index 12ed19cd..1d0fb341 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,27 @@
+# Microsoft 365 Agents SDK for Python - Release Notes v1.1.0
+
+**Release Date:** 2026-06-19
+**Previous Version:** 1.0.0 (Released May 22, 2026)
+
+## Major Features & Enhancements
+
+- **Slack Hosting Package**: New `microsoft-agents-hosting-slack` package for building Slack agents — direct-to-Slack responses across the full Slack Web API surface, a typed `SlackChannelData` envelope with dot-notation access, a `SlackAgentExtension` for channel-scoped handlers, and a `SlackStream` helper for incremental streaming (#390)
+- **IMDS Authentication**: Support for Azure Instance Metadata Service (IMDS) authentication in MSAL auth (#413)
+- **MSAL Azure Region**: Configurable Azure region on MSAL config for regional token endpoints (#409)
+
+## Bug Fixes
+
+- **Agentic Conversation ID**: Sanitize conversation ID for agentic requests on the agents channel (#402)
+- **Starlette Dependency**: Added explicit `starlette` dependency to pull in the fix for CVE-2026-48710 (#406)
+
+## Developer Experience
+
+- **Integration Testing**: Integration testing enhancements (#408)
+- **Testing Initialization Helper**: New testing initialization helper (#416)
+- **Typing Annotations**: Updated typing annotations across the codebase (#418)
+
+---
+
# Microsoft 365 Agents SDK for Python - Release Notes v1.0.0
**Release Date:** May 22, 2026
diff --git a/libraries/microsoft-agents-activity/readme.md b/libraries/microsoft-agents-activity/readme.md
index 4402a0a9..9a86af4f 100644
--- a/libraries/microsoft-agents-activity/readme.md
+++ b/libraries/microsoft-agents-activity/readme.md
@@ -15,6 +15,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
Date |
Release Notes |
+
+ | 1.1.0 |
+ 2026-06-19 |
+
+
+ 1.1.0 Release Notes
+
+ |
+
| 1.0.0 |
2026-05-22 |
diff --git a/libraries/microsoft-agents-authentication-msal/readme.md b/libraries/microsoft-agents-authentication-msal/readme.md
index 1557fd06..2ca6ef60 100644
--- a/libraries/microsoft-agents-authentication-msal/readme.md
+++ b/libraries/microsoft-agents-authentication-msal/readme.md
@@ -15,6 +15,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
Date |
Release Notes |
+
+ | 1.1.0 |
+ 2026-06-19 |
+
+
+ 1.1.0 Release Notes
+
+ |
+
| 1.0.0 |
2026-05-22 |
diff --git a/libraries/microsoft-agents-copilotstudio-client/readme.md b/libraries/microsoft-agents-copilotstudio-client/readme.md
index e4e7caba..b8272286 100644
--- a/libraries/microsoft-agents-copilotstudio-client/readme.md
+++ b/libraries/microsoft-agents-copilotstudio-client/readme.md
@@ -16,6 +16,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
Date |
Release Notes |
+
+ | 1.1.0 |
+ 2026-06-19 |
+
+
+ 1.1.0 Release Notes
+
+ |
+
| 1.0.0 |
2026-05-22 |
diff --git a/libraries/microsoft-agents-hosting-aiohttp/readme.md b/libraries/microsoft-agents-hosting-aiohttp/readme.md
index 27bb17fa..c37934c8 100644
--- a/libraries/microsoft-agents-hosting-aiohttp/readme.md
+++ b/libraries/microsoft-agents-hosting-aiohttp/readme.md
@@ -17,6 +17,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
Date |
Release Notes |
+
+ | 1.1.0 |
+ 2026-06-19 |
+
+
+ 1.1.0 Release Notes
+
+ |
+
| 1.0.0 |
2026-05-22 |
diff --git a/libraries/microsoft-agents-hosting-core/readme.md b/libraries/microsoft-agents-hosting-core/readme.md
index 42a085db..65c6bf29 100644
--- a/libraries/microsoft-agents-hosting-core/readme.md
+++ b/libraries/microsoft-agents-hosting-core/readme.md
@@ -16,6 +16,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
Date |
Release Notes |
+
+ | 1.1.0 |
+ 2026-06-19 |
+
+
+ 1.1.0 Release Notes
+
+ |
+
| 1.0.0 |
2026-05-22 |
diff --git a/libraries/microsoft-agents-hosting-dialogs/readme.md b/libraries/microsoft-agents-hosting-dialogs/readme.md
index d9a411cd..98630500 100644
--- a/libraries/microsoft-agents-hosting-dialogs/readme.md
+++ b/libraries/microsoft-agents-hosting-dialogs/readme.md
@@ -64,6 +64,15 @@ dialogs.add(WaterfallDialog("main", [step1, step2]))
Date |
Release Notes |
+
+ | 1.1.0 |
+ 2026-06-19 |
+
+
+ 1.1.0 Release Notes
+
+ |
+
| 1.0.0 |
2026-05-22 |
diff --git a/libraries/microsoft-agents-hosting-fastapi/readme.md b/libraries/microsoft-agents-hosting-fastapi/readme.md
index b1fb45c7..7de12b5d 100644
--- a/libraries/microsoft-agents-hosting-fastapi/readme.md
+++ b/libraries/microsoft-agents-hosting-fastapi/readme.md
@@ -9,6 +9,15 @@ This library provides FastAPI integration for Microsoft Agents, enabling you to
Date |
Release Notes |
+
+ | 1.1.0 |
+ 2026-06-19 |
+
+
+ 1.1.0 Release Notes
+
+ |
+
| 1.0.0 |
2026-05-22 |
diff --git a/libraries/microsoft-agents-hosting-slack/readme.md b/libraries/microsoft-agents-hosting-slack/readme.md
index 27fc3042..d514a393 100644
--- a/libraries/microsoft-agents-hosting-slack/readme.md
+++ b/libraries/microsoft-agents-hosting-slack/readme.md
@@ -4,6 +4,24 @@
Integration library for building Slack agents using the Microsoft 365 Agents SDK. Provides direct-to-Slack responses (the full Slack Web API surface, beyond what Azure Bot Service exposes), a typed `SlackChannelData` envelope with dot-notation property access, and a `SlackStream` helper for `chat.startStream` / `chat.appendStream` / `chat.stopStream`.
+## Release Notes
+
+
## Installation
```bash
diff --git a/libraries/microsoft-agents-hosting-teams/readme.md b/libraries/microsoft-agents-hosting-teams/readme.md
index e789bbdc..d66fd350 100644
--- a/libraries/microsoft-agents-hosting-teams/readme.md
+++ b/libraries/microsoft-agents-hosting-teams/readme.md
@@ -18,6 +18,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
Date |
Release Notes |
+
+ | 1.1.0 |
+ 2026-06-19 |
+
+
+ 1.1.0 Release Notes
+
+ |
+
| 1.0.0 |
2026-05-22 |
diff --git a/libraries/microsoft-agents-storage-blob/readme.md b/libraries/microsoft-agents-storage-blob/readme.md
index a7429c66..e9ce5718 100644
--- a/libraries/microsoft-agents-storage-blob/readme.md
+++ b/libraries/microsoft-agents-storage-blob/readme.md
@@ -16,6 +16,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
Date |
Release Notes |
+
+ | 1.1.0 |
+ 2026-06-19 |
+
+
+ 1.1.0 Release Notes
+
+ |
+
| 1.0.0 |
2026-05-22 |
diff --git a/libraries/microsoft-agents-storage-cosmos/readme.md b/libraries/microsoft-agents-storage-cosmos/readme.md
index 3cd2c2ad..72368120 100644
--- a/libraries/microsoft-agents-storage-cosmos/readme.md
+++ b/libraries/microsoft-agents-storage-cosmos/readme.md
@@ -16,6 +16,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
Date |
Release Notes |
+
+ | 1.1.0 |
+ 2026-06-19 |
+
+
+ 1.1.0 Release Notes
+
+ |
+
| 1.0.0 |
2026-05-22 |
diff --git a/versioning/TARGET-VERSION b/versioning/TARGET-VERSION
index 29988293..5d352680 100644
--- a/versioning/TARGET-VERSION
+++ b/versioning/TARGET-VERSION
@@ -1 +1 @@
-1.1.0.
+1.2.0.