diff --git a/setup.py b/setup.py
index a656922..4399a39 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,7 @@
 import setuptools
 from pathlib import Path
 
-VERSION = '1.6.5'
+VERSION = '1.6.6'
 INSTALL_REQUIRES = [
     'pymongo >= 3',
     'blinker >= 1.2',