diff --git a/ethers.nimble b/ethers.nimble
index 3b63066..fa4fb99 100644
--- a/ethers.nimble
+++ b/ethers.nimble
@@ -4,7 +4,7 @@ description = "library for interacting with Ethereum"
 license = "MIT"
 
 requires "chronos >= 3.0.0 & < 4.0.0"
-requires "contractabi >= 0.4.5 & < 0.5.0"
+requires "contractabi#distinct"
 requires "questionable >= 0.10.2 & < 0.11.0"
 requires "upraises >= 0.1.0 & < 0.2.0"
 requires "json_rpc"