diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 96f1cd9..4c313f9 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.3.0"
+  ".": "1.4.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index c103dd4..cf946c0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 All notable changes to the LaunchDarkly SSE Client for Python will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org).
 
+## [1.4.0](https://github.com/launchdarkly/python-eventsource/compare/1.3.0...1.4.0) (2025-11-03)
+
+
+### Features
+
+* Support dynamic query parameters on reconnect ([#51](https://github.com/launchdarkly/python-eventsource/issues/51)) ([d09ca93](https://github.com/launchdarkly/python-eventsource/commit/d09ca936a0d15f937cafd91deb11963d5f281813))
+
 ## [1.3.0](https://github.com/launchdarkly/python-eventsource/compare/1.2.4...1.3.0) (2025-06-26)
 
 
diff --git a/ld_eventsource/version.py b/ld_eventsource/version.py
index e8c261b..83b1e8b 100644
--- a/ld_eventsource/version.py
+++ b/ld_eventsource/version.py
@@ -1 +1 @@
-VERSION = "1.3.0"  # x-release-please-version
+VERSION = "1.4.0"  # x-release-please-version
diff --git a/pyproject.toml b/pyproject.toml
index 8fb6ab8..1500975 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "launchdarkly-eventsource"
-version = "1.3.0"
+version = "1.4.0"
 description = "LaunchDarkly SSE Client"
 authors = ["LaunchDarkly <dev@launchdarkly.com>"]
 license = "Apache-2.0"