diff --git a/releasenotes/notes/deprecate-auth_version-45a3cbb9711ac0aa.yaml b/releasenotes/notes/deprecate-auth_version-45a3cbb9711ac0aa.yaml
new file mode 100644
index 0000000..206edad
--- /dev/null
+++ b/releasenotes/notes/deprecate-auth_version-45a3cbb9711ac0aa.yaml
@@ -0,0 +1,5 @@
+---
+deprecations:
+  - |
+    The ``auth_version`` option has been deprecated and has no effect. This
+    option will be removed in a future release.