diff --git a/Cargo.toml b/Cargo.toml
index 2c0be67..05a1ddb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,7 +18,7 @@ hex = "0.4"
 hex-literal = "0.4"
 aes = "0.8"
 ctr = "0.9"
-hmac = "0.12"
+hmac = "0.13"
 md-5 = "0.10"
 rand = "0.8"
 anyhow = "1.0"