diff --git a/tough/Cargo.toml b/tough/Cargo.toml
index 32ae4167..b9d83413 100644
--- a/tough/Cargo.toml
+++ b/tough/Cargo.toml
@@ -40,7 +40,7 @@ indexmap = { version = "2.5.0", features = ["serde"] }
 
 [dev-dependencies]
 failure-server = { path = "../integ/failure-server" }
-hex-literal = "0.4"
+hex-literal = "1.0"
 httptest = "0.15"
 maplit = "1"
 tokio = { version = "1", features = ["macros", "rt", "rt-multi-thread"] }