diff --git a/CHANGELOG.md b/CHANGELOG.md
index 715d82b..bb2da40 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,7 +9,7 @@ and uses [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 ## [3.1.1]
 
 ### Fixed
-* Pin Python version to `<3.13` because the standard library [`cgi` module](https://docs.python.org/3.12/library/cgi.html) has been removed in Python 3.13.
+* Pin Python version to `<3.13` because the standard library [`cgi` module](https://docs.python.org/3.12/library/cgi.html) has been removed in Python 3.13. See <https://github.com/ASFHyP3/hyp3-lib/issues/300>.
 
 ## [3.1.0]
 
diff --git a/environment.yml b/environment.yml
index 55160d0..449099e 100644
--- a/environment.yml
+++ b/environment.yml
@@ -3,7 +3,7 @@ channels:
   - conda-forge
   - nodefaults
 dependencies:
-  # FIXME: standard lib `cgi` module removed in 3.13: https://docs.python.org/3.12/library/cgi.html
+  # FIXME: standard lib `cgi` module removed in 3.13: https://github.com/ASFHyP3/hyp3-lib/issues/300
   - python>=3.10,<3.13
   - pip
   # For running
diff --git a/pyproject.toml b/pyproject.toml
index f449465..4c9b19d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "hyp3lib"
-# FIXME: standard lib `cgi` module removed in 3.13: https://docs.python.org/3.12/library/cgi.html
+# FIXME: standard lib `cgi` module removed in 3.13: https://github.com/ASFHyP3/hyp3-lib/issues/300
 requires-python = ">=3.10,<3.13"
 readme = "README.md"
 authors = [