diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 9695e0e..32ebf8e 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "9.1.0"
+  ".": "9.1.1"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8651c98..4a456a4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,14 @@
 
 All notable changes to the LaunchDarkly Python SDK will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org).
 
+## [9.1.1](https://github.com/launchdarkly/python-server-sdk/compare/9.1.0...9.1.1) (2024-01-11)
+
+
+### Bug Fixes
+
+* **deps:** Update pytest-mypy requirement from ==0.8.1 to ==0.10.3 ([#249](https://github.com/launchdarkly/python-server-sdk/issues/249)) ([f2e2e17](https://github.com/launchdarkly/python-server-sdk/commit/f2e2e1722f4d3a57ce0cbaf61db2efa11d35f748))
+* Update missing version number change ([#238](https://github.com/launchdarkly/python-server-sdk/issues/238)) ([7efedc8](https://github.com/launchdarkly/python-server-sdk/commit/7efedc879d5b9d2b2decad8eb344cf39af80f993))
+
 ## [9.1.0](https://github.com/launchdarkly/python-server-sdk/compare/9.0.1...9.1.0) (2023-12-20)
 
 
diff --git a/ldclient/version.py b/ldclient/version.py
index ce654ad..7ce5bc1 100644
--- a/ldclient/version.py
+++ b/ldclient/version.py
@@ -1 +1 @@
-VERSION = "9.1.0" # x-release-please-version
+VERSION = "9.1.1" # x-release-please-version
diff --git a/pyproject.toml b/pyproject.toml
index d41f6f7..3889aa2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "launchdarkly-server-sdk"
-version = "9.1.0"
+version = "9.1.1"
 description = "LaunchDarkly SDK for Python"
 authors = ["LaunchDarkly <dev@launchdarkly.com>"]
 license = "Apache-2.0"