diff --git a/C02S05/requirements.txt b/C02S05/requirements.txt
index 7aa2f5b..f01f24b 100644
--- a/C02S05/requirements.txt
+++ b/C02S05/requirements.txt
@@ -1,5 +1,5 @@
 eth_utils == 1.7.0
-eth_account == 0.4.0
+eth_account == 0.5.9
 eth_abi == 2.0.0
 
 git+https://github.com/blockvigil/ethvigil-python-sdk.git