diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5cc6f603..612ccc73 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Optimizely Python SDK Changelog
 
+## 3.9.0
+June 1st, 2021
+
+### New Features
+* Added support for multiple concurrent prioritized experiments per flag. [#322](https://github.com/optimizely/python-sdk/pull/322)
+
+
 ## 3.8.0
 February 12th, 2021
 
diff --git a/optimizely/version.py b/optimizely/version.py
index f9a270d4..b0f0bda1 100644
--- a/optimizely/version.py
+++ b/optimizely/version.py
@@ -11,5 +11,5 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-version_info = (3, 8, 0)
+version_info = (3, 9, 0)
 __version__ = '.'.join(str(v) for v in version_info)