diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 9d99d7d3..ee1dc09b 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -2,7 +2,7 @@
   "hooks/openfeature-hooks-opentelemetry": "0.3.1",
   "providers/openfeature-provider-aws-ssm": "0.1.1",
   "providers/openfeature-provider-ofrep": "0.3.0",
-  "providers/openfeature-provider-flagd": "0.5.0",
+  "providers/openfeature-provider-flagd": "0.5.1",
   "providers/openfeature-provider-flipt": "0.1.3",
   "providers/openfeature-provider-env-var": "0.1.1",
   "providers/openfeature-provider-unleash": "0.1.2",
diff --git a/providers/openfeature-provider-flagd/CHANGELOG.md b/providers/openfeature-provider-flagd/CHANGELOG.md
index 621ce9a6..7f20f11a 100644
--- a/providers/openfeature-provider-flagd/CHANGELOG.md
+++ b/providers/openfeature-provider-flagd/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.5.1](https://github.com/open-feature/python-sdk-contrib/compare/openfeature-provider-flagd/v0.5.0...openfeature-provider-flagd/v0.5.1) (2026-07-09)
+
+
+### 🐛 Bug Fixes
+
+* **flagd:** use FLAGD_SYNC_PORT for in-process provider with backwards compatibility ([#345](https://github.com/open-feature/python-sdk-contrib/issues/345)) ([47a8b8a](https://github.com/open-feature/python-sdk-contrib/commit/47a8b8ac55ea8f1831f31aa08a2ccf7c2d7eaa89))
+
 ## [0.5.0](https://github.com/open-feature/python-sdk-contrib/compare/openfeature-provider-flagd/v0.4.1...openfeature-provider-flagd/v0.5.0) (2026-06-02)
 
 
diff --git a/providers/openfeature-provider-flagd/pyproject.toml b/providers/openfeature-provider-flagd/pyproject.toml
index 0d951ad9..42855931 100644
--- a/providers/openfeature-provider-flagd/pyproject.toml
+++ b/providers/openfeature-provider-flagd/pyproject.toml
@@ -5,7 +5,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "openfeature-provider-flagd"
-version = "0.5.0"
+version = "0.5.1"
 description = "OpenFeature provider for the flagd flag evaluation engine"
 readme = "README.md"
 authors = [{ name = "OpenFeature", email = "openfeature-core@groups.io" }]