diff --git a/curve25519-dalek/Cargo.toml b/curve25519-dalek/Cargo.toml
index 2da4d3b3..49175cdf 100644
--- a/curve25519-dalek/Cargo.toml
+++ b/curve25519-dalek/Cargo.toml
@@ -33,7 +33,6 @@ features = ["serde", "rand_core", "digest", "legacy_compatibility"]
 sha2 = { version = "0.10", default-features = false }
 bincode = "1"
 criterion = { version = "0.4.0", features = ["html_reports"] }
-hex = "0.4.2"
 rand = "0.8"
 rand_core = { version = "0.6", default-features = false, features = ["getrandom"] }
 
@@ -48,6 +47,7 @@ required-features = ["alloc", "rand_core"]
 
 [dependencies]
 cfg-if = "1"
+hex = "0.4.2"
 rand_core = { version = "0.6.4", default-features = false, optional = true }
 digest = { version = "0.10", default-features = false, optional = true }
 subtle = { version = "2.3.0", default-features = false }