diff --git a/python/requirements.txt b/python/requirements.txt
index 039c803..a57aa4e 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -1,4 +1,4 @@
-chainlib-eth==0.4.18
+chainlib-eth==0.4.20
 chainlib==0.4.13
 eth-erc20==0.7.3
 eth-erc721==0.2.1