diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index f2ada20..af3e13d 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.7.2"
+  ".": "1.7.3"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 90243f3..fa90ab9 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).
 
+## [1.7.3](https://github.com/launchdarkly/python-eventsource/compare/1.7.2...1.7.3) (2026-09-17)
+
+
+### Bug Fixes
+
+* avoid quadratic buffering of long SSE lines ([#76](https://github.com/launchdarkly/python-eventsource/issues/76)) ([8ede399](https://github.com/launchdarkly/python-eventsource/commit/8ede39958b215653eda8ec7ca29e00d6421e3287))
+
 ## [1.7.2](https://github.com/launchdarkly/python-eventsource/compare/1.7.1...1.7.2) (2026-07-22)
 
 
diff --git a/ld_eventsource/version.py b/ld_eventsource/version.py
index afe3bd6..4ea800a 100644
--- a/ld_eventsource/version.py
+++ b/ld_eventsource/version.py
@@ -1 +1 @@
-VERSION = "1.7.2"  # x-release-please-version
+VERSION = "1.7.3"  # x-release-please-version
diff --git a/pyproject.toml b/pyproject.toml
index 20d988b..45db6eb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "launchdarkly-eventsource"
-version = "1.7.2"
+version = "1.7.3"
 description = "LaunchDarkly SSE Client"
 authors = [
     {name = "LaunchDarkly", email = "dev@launchdarkly.com"}