diff --git a/lib/python/pyflyby/_version.py b/lib/python/pyflyby/_version.py
index 56d1e3d9..aa5a2cfc 100644
--- a/lib/python/pyflyby/_version.py
+++ b/lib/python/pyflyby/_version.py
@@ -5,4 +5,4 @@
 
 
 
-__version__ = '1.9.0'
+__version__ = '1.9.1'