diff --git a/backend/Cargo.toml b/backend/Cargo.toml
index 9f61c16..657fb7e 100644
--- a/backend/Cargo.toml
+++ b/backend/Cargo.toml
@@ -41,7 +41,7 @@ anyhow = "1.0"
 time = "0.3"
 
 sha2 = "0.10"
-hmac = "0.12"
+hmac = "0.13"
 subtle = "2.5"
 reqwest = { version = "0.13", features = ["json"] }
 html-escape = "0.2"