diff --git a/Cargo.toml b/Cargo.toml
index 2c0be67..c996d01 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,7 +15,7 @@ chrono = { version = "0.4", features = [ "serde" ] }
 sha1 = "0.10"
 sha2 = "0.10"
 hex = "0.4"
-hex-literal = "0.4"
+hex-literal = "1.0"
 aes = "0.8"
 ctr = "0.9"
 hmac = "0.12"