diff --git a/Cargo.toml b/Cargo.toml
index 7dff8eba..a7c0668b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -42,7 +42,7 @@ scopeguard = "1.1"
 serde = { version = "1.0", features = ["derive"], optional = true }
 
 [dev-dependencies]
-assert_hex = "0.2.2"
+assert_hex = "0.4.1"
 clap = { version = "3.1.6", features = ["derive"] }
 
 [features]