diff --git a/multicall/multicall.py b/multicall/multicall.py
index c7b2183b..c0763b28 100644
--- a/multicall/multicall.py
+++ b/multicall/multicall.py
@@ -4,7 +4,7 @@
 
 import aiohttp
 import requests
-from eth_utils import to_checksum_address
+from cchecksum import to_checksum_address
 from eth_utils.toolz import concat, mapcat
 
 from multicall.call import AnyAddress