diff --git a/CHANGELOG b/CHANGELOG
index 8ac2c19..47a2b96 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+## 1.9.1
+
+* Pin to `Cython<3` to fix build
+
 ## 1.9.0
 
 * Drop support for Python 3.6; add support for Python 3.11
diff --git a/setup.py b/setup.py
index 180b536..bd12721 100644
--- a/setup.py
+++ b/setup.py
@@ -36,7 +36,7 @@
 )
 
 
-VERSION = "1.9.0"
+VERSION = "1.9.1"
 
 
 EXTENSIONS = [