diff --git a/src/main.rs b/src/main.rs
index cd3f626..03b6ddd 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -65,9 +65,9 @@ fn get_hook_commands(clone_url: &str) -> Option<Vec<String>> {
     None
 }
 
-fn is_valid_signature(received_signature: &Vec<u8>, payload: &Vec<u8>) -> bool {
+fn is_valid_signature(received_signature: &[u8], payload: &[u8]) -> bool {
     let mut mac = Hmac::<Sha256>::new_from_slice(&get_secret()).unwrap();
-    mac.update(&payload);
+    mac.update(payload);
     let expected_signature = mac.finalize().into_bytes();
 
     received_signature[..] == expected_signature[..]