diff --git a/jose-jwk/src/crypto/p521.rs b/jose-jwk/src/crypto/p521.rs
index 0049d51..4a3df86 100644
--- a/jose-jwk/src/crypto/p521.rs
+++ b/jose-jwk/src/crypto/p521.rs
@@ -18,7 +18,7 @@ impl KeyInfo for PublicKey {
     }
 
     fn is_supported(&self, algo: &Algorithm) -> bool {
-        matches!(algo, Signing(Es384))
+        matches!(algo, Signing(Es512))
     }
 }
 
@@ -28,7 +28,7 @@ impl KeyInfo for SecretKey {
     }
 
     fn is_supported(&self, algo: &Algorithm) -> bool {
-        matches!(algo, Signing(Es384))
+        matches!(algo, Signing(Es512))
     }
 }