diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index fde2101..950983f 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-    ".": "5.5.0"
+    ".": "5.5.1"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4f0d09f..70fc487 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Changelog
 
+## [5.5.1](https://github.com/Flagsmith/flagsmith-python-client/compare/v5.5.0...v5.5.1) (2026-06-12)
+
+### CI
+
+- pre-commit autoupdate ([#219](https://github.com/Flagsmith/flagsmith-python-client/issues/219))
+  ([134e6b6](https://github.com/Flagsmith/flagsmith-python-client/commit/134e6b65ebe11e89a37ae2d1c98b487871d5a216))
+
+### Other
+
+- **deps:** bump idna from 3.10 to 3.15 ([#218](https://github.com/Flagsmith/flagsmith-python-client/issues/218))
+  ([4d71722](https://github.com/Flagsmith/flagsmith-python-client/commit/4d71722421d3692af07d68bbf71216b4de1b2eed))
+
 ## [5.5.0](https://github.com/Flagsmith/flagsmith-python-client/compare/v5.4.0...v5.5.0) (2026-06-09)
 
 ### Features
diff --git a/pyproject.toml b/pyproject.toml
index ff053bb..bf25635 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "flagsmith"
-version = "5.5.0"
+version = "5.5.1"
 description = "Flagsmith Python SDK"
 authors = ["Flagsmith <support@flagsmith.com>"]
 license = "BSD3"