diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 75c844b2..01247cfe 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -24,7 +24,7 @@ jobs:
       - name: Setup poetry
         uses: abatilo/actions-poetry@v4
         with:
-          poetry-version: '2.1.4'
+          poetry-version: '1.8.5'
 
       - name: Setup a local virtual environment
         run: |
@@ -56,6 +56,27 @@ jobs:
         with:
           name: python-package-distributions
           path: dist/
+      - name: Check that wheel and tarball contains ably/sync/
+        run: |
+          # Check wheel
+          WHEEL=$(ls dist/*.whl | head -n 1)
+          echo "Checking wheel: $WHEEL"
+          if unzip -l "$WHEEL" | grep -q "ably/sync/"; then
+            echo "✅ Found ably/sync/ in wheel"
+          else
+            echo "❌ ably/sync/ not found in wheel"
+            exit 1
+          fi
+          
+          # Check tarball
+          TARBALL=$(ls dist/*.tar.gz | head -n 1)
+          echo "Checking tarball: $TARBALL"
+          if tar -tzf "$TARBALL" | grep -q "ably/sync/"; then
+            echo "✅ Found ably/sync/ in tarball"
+          else
+            echo "❌ ably/sync/ not found in tarball"
+            exit 1
+          fi
 
   publish-to-pypi:
     name: Publish Python distribution to PyPI
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e7b0c237..bc495d7c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Change Log
 
+## [v2.1.1](https://github.com/ably/ably-python/tree/v2.1.1)
+
+[Full Changelog](https://github.com/ably/ably-python/compare/v2.1.0...v2.1.1)
+
+## What's Changed
+
+* Added missed `sync` folder to the wheel package 
+
 ## [v2.1.0](https://github.com/ably/ably-python/tree/v2.1.0)
 
 [Full Changelog](https://github.com/ably/ably-python/compare/v2.0.13...v2.1.0)
diff --git a/ably/__init__.py b/ably/__init__.py
index 7d56c471..221aef2b 100644
--- a/ably/__init__.py
+++ b/ably/__init__.py
@@ -16,4 +16,4 @@
 logger.addHandler(logging.NullHandler())
 
 api_version = '3'
-lib_version = '2.1.0'
+lib_version = '2.1.1'
diff --git a/pyproject.toml b/pyproject.toml
index 88c76d05..d50ebb78 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "ably"
-version = "2.1.0"
+version = "2.1.1"
 description = "Python REST and Realtime client library SDK for Ably realtime messaging service"
 license = "Apache-2.0"
 authors = ["Ably <support@ably.com>"]