diff --git a/src/Algorithms.php b/src/Algorithms.php
index a0324b9..0692ad1 100644
--- a/src/Algorithms.php
+++ b/src/Algorithms.php
@@ -121,7 +121,7 @@ abstract class Algorithms
 
     final public const COSE_ALGORITHM_RSAES_OAEP_512 = -42;
 
-    final public const COSE_ALGORITHM_ES256K = -46;
+    final public const COSE_ALGORITHM_ES256K = -47;
 
     final public const COSE_ALGORITHM_RS256 = -257;