diff --git a/docs/changelog.rst b/docs/changelog.rst
index 7be1f9d..3339f0d 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -2,6 +2,13 @@
  Changelog
 ===========
 
+.. _3.9.1:
+
+3.9.1 (2021-06-12)
+------------------
+
+- Fixed bug when using ``table.upsert_all()`` to create a table with only a single column that is treated as the primary key. (`#271 <https://github.com/simonw/sqlite-utils/issues/271>`__)
+
 .. _v3_9:
 
 3.9 (2021-06-11)
diff --git a/setup.py b/setup.py
index fd2e98a..9c73ff4 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@ from setuptools import setup, find_packages
 import io
 import os
 
-VERSION = "3.9"
+VERSION = "3.9.1"
 
 
 def get_long_description():