diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0af0ec16..c548b17b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+### Fixed
+
+- Update `requires-python` in metadata to require >= 3.9 ([#684](https://github.com/stac-utils/pystac-client/pull/684))
+
 ## [v0.7.7]
 
 ### Changed
diff --git a/pyproject.toml b/pyproject.toml
index 8087906a..32ce01f2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,7 +25,7 @@ classifiers = [
     "Topic :: Software Development :: Libraries",
     "Topic :: Software Development :: Libraries :: Python Modules",
 ]
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 dependencies = [
     "requests>=2.28.2",
     "pystac[validation]>=1.10.0",