diff --git a/requirements-release.txt b/requirements-release.txt
index 333d561c..e1454d3a 100644
--- a/requirements-release.txt
+++ b/requirements-release.txt
@@ -1 +1,7 @@
-python-semantic-release == 10.6.*
\ No newline at end of file
+python-semantic-release == 10.6.*
+# GitPython 3.1.60 dropped Actor.name_email_regex, which python-semantic-release
+# 10.6.1 still references; the release bump dies with
+# "type object 'Actor' has no attribute 'name_email_regex'" before it does any
+# git work. PSR depends on `gitpython~=3.0`, so the bad version floats in on a
+# fresh install. Unpin once PSR ships a release compatible with 3.1.60+.
+GitPython == 3.1.59