diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3681c7c3..fe7d7869 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,8 @@
 # Release History
-# 1.3.9 (Unreleased)
+
+# 1.3.9 (2026-09-09)
 ### Features Added
-- - Update OpenTelemetry dependencies to latest versions, bump `langchain-core` minimum version to address S360, and support the new `httpx2` entry point exposed by `opentelemetry-instrumentation-httpx`.
+- Update OpenTelemetry dependencies to latest versions, bump `langchain-core` minimum version to address S360, and support the new `httpx2` entry point exposed by `opentelemetry-instrumentation-httpx`.
   ([#254](https://github.com/microsoft/opentelemetry-distro-python/pull/254))
 - Add independent dependency checks for the `httpx` and `httpx2` instrumentation entry points.
   ([#259](https://github.com/microsoft/opentelemetry-distro-python/pull/259))
diff --git a/pyproject.toml b/pyproject.toml
index 5918c02c..48ff5f4d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "microsoft-opentelemetry"
-version = "1.3.8"
+version = "1.3.9"
 description = "Minimal template for the Microsoft OpenTelemetry distro for Python"
 readme = "README.md"
 requires-python = ">=3.10"
diff --git a/src/microsoft/opentelemetry/_version.py b/src/microsoft/opentelemetry/_version.py
index 34b18e43..fe034d31 100644
--- a/src/microsoft/opentelemetry/_version.py
+++ b/src/microsoft/opentelemetry/_version.py
@@ -4,4 +4,4 @@
 # license information.
 # --------------------------------------------------------------------------
 
-VERSION = "1.3.8"
+VERSION = "1.3.9"