diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index c8f5b36..3229161 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-    ".": "5.1.0"
+    ".": "5.1.1"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index aa056b3..d1e93a2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [5.1.1](https://github.com/Flagsmith/flagsmith-python-client/compare/v5.1.0...v5.1.1) (2026-01-05)
+
+### Bug Fixes
+
+- use-typing-extension ([#188](https://github.com/Flagsmith/flagsmith-python-client/issues/188))
+  ([a636536](https://github.com/Flagsmith/flagsmith-python-client/commit/a636536162f94589bd7337090dad493fb3745ef0))
+
 ## [5.1.0](https://github.com/Flagsmith/flagsmith-python-client/compare/v5.0.3...v5.1.0) (2026-01-05)
 
 ### Features
diff --git a/pyproject.toml b/pyproject.toml
index 762de5a..c059862 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "flagsmith"
-version = "5.1.0"
+version = "5.1.1"
 description = "Flagsmith Python SDK"
 authors = ["Flagsmith <support@flagsmith.com>"]
 license = "BSD3"