diff --git a/requirements.txt b/requirements.txt
index 8850ffe..0a101c8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,5 +11,6 @@ erc20-faucet==0.7.0
 eth-faucet==0.3.2
 erc20-transfer-authorization==0.5.0
 erc20-demurrage-token==0.5.0
+eth-interface==0.1.1
 #cic-contracts==0.2.0
 #defalsify-evm==0.2.0