diff --git a/README.md b/README.md
index 700ac27..9fccfe1 100644
--- a/README.md
+++ b/README.md
@@ -144,7 +144,7 @@ life_time              3600       1h0m0s
 storage_window_size    24         2h0m0s
 validity_window_size   12
 http_server            ca.example.com/path
-public_key fingerprint dilithium5:85b5a617ef109e0a8d68a094c8b969f622ac4096c513fa0acd169c231ce2fad5
+public_key fingerprint ml-dsa-87:85b5a617ef109e0a8d68a094c8b969f622ac4096c513fa0acd169c231ce2fad5
 ```
 
 The `batches` folder is empty, because there are no batches issued yet.
diff --git a/ca/ca.go b/ca/ca.go
index b282d75..5a39f8b 100644
--- a/ca/ca.go
+++ b/ca/ca.go
@@ -1040,7 +1040,7 @@ func New(path string, opts NewOpts) (*Handle, error) {
 	h.params.Issuer = opts.Issuer
 
 	if opts.SignatureScheme == 0 {
-		opts.SignatureScheme = mtc.TLSDilitihium5r3
+		opts.SignatureScheme = mtc.TLSMLDSA87
 	}
 
 	// Generate keypair
diff --git a/go.mod b/go.mod
index beeda95..3a86b1b 100644
--- a/go.mod
+++ b/go.mod
@@ -1,9 +1,9 @@
 module github.com/bwesterb/mtc
 
-go 1.21.2
+go 1.23.3
 
 require (
-	github.com/cloudflare/circl v1.3.9
+	github.com/cloudflare/circl v1.5.0
 	github.com/nightlyone/lockfile v1.0.0
 	github.com/urfave/cli/v2 v2.27.1
 	golang.org/x/crypto v0.25.0
diff --git a/go.sum b/go.sum
index 9437100..13d43bd 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,7 @@
 github.com/cloudflare/circl v1.3.9 h1:QFrlgFYf2Qpi8bSpVPK1HBvWpx16v/1TZivyo7pGuBE=
 github.com/cloudflare/circl v1.3.9/go.mod h1:PDRU+oXvdD7KCtgKxW95M5Z8BpSCJXQORiZFnBQS5QU=
+github.com/cloudflare/circl v1.5.0 h1:hxIWksrX6XN5a1L2TI/h53AGPhNHoUBo+TD1ms9+pys=
+github.com/cloudflare/circl v1.5.0/go.mod h1:uddAzsPgqdMAYatqJ0lsjX1oECcQLIlRpzZh3pJrofs=
 github.com/cpuguy83/go-md2man/v2 v2.0.2 h1:p1EgwI/C7NhT0JmVkwCD2ZBK8j4aeHQX2pMHHBfMQ6w=
 github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/nightlyone/lockfile v1.0.0 h1:RHep2cFKK4PonZJDdEl4GmkabuhbsRMgk/k3uAmxBiA=
diff --git a/mtc.go b/mtc.go
index 206fe63..c7eb3c4 100644
--- a/mtc.go
+++ b/mtc.go
@@ -112,10 +112,10 @@ const (
 	TLSECDSAWithP521AndSHA512 SignatureScheme = 0x0603
 	TLSEd25519                SignatureScheme = 0x0807
 
-	// Just for testing we use round 3 Dilithium5 with a codepoint in the
-	// private use region. For production SPHINCS⁺-128s would be a better
-	// choice.
-	TLSDilitihium5r3 SignatureScheme = 0xfe3c
+	// Just for testing we use ML-DSA-87 with a codepoint in the
+	// private use region.
+	// For production SLH-DSA-128s would be a better choice.
+	TLSMLDSA87 SignatureScheme = 0x0906
 )
 
 type AbridgedTLSSubject struct {
diff --git a/signature.go b/signature.go
index 6e1b907..b3bafdf 100644
--- a/signature.go
+++ b/signature.go
@@ -11,7 +11,7 @@ import (
 	"errors"
 	"fmt"
 
-	dil5 "github.com/cloudflare/circl/sign/dilithium/mode5"
+	mldsa "github.com/cloudflare/circl/sign/mldsa/mldsa87"
 )
 
 // Signing public key with specific hash and options.
@@ -74,20 +74,20 @@ func (v *ecdsaVerifier) Verify(msg, sig []byte) error {
 	return errors.New("ecdsa verification failed")
 }
 
-type dil5Verifier dil5.PublicKey
+type mldsaVerifier mldsa.PublicKey
 
-func (v *dil5Verifier) Bytes() []byte {
-	var ret [dil5.PublicKeySize]byte
-	(*dil5.PublicKey)(v).Pack(&ret)
+func (v *mldsaVerifier) Bytes() []byte {
+	var ret [mldsa.PublicKeySize]byte
+	(*mldsa.PublicKey)(v).Pack(&ret)
 	return ret[:]
 }
-func (v *dil5Verifier) Scheme() SignatureScheme { return TLSDilitihium5r3 }
-func (v *dil5Verifier) Verify(msg, sig []byte) error {
-	if dil5.Verify((*dil5.PublicKey)(v), msg, sig) {
+func (v *mldsaVerifier) Scheme() SignatureScheme { return TLSMLDSA87 }
+func (v *mldsaVerifier) Verify(msg, sig []byte) error {
+	if mldsa.Verify((*mldsa.PublicKey)(v), msg, nil, sig) {
 		return nil
 	}
 
-	return errors.New("dilithium5 verification failed")
+	return errors.New("ML-DSA verification failed")
 }
 
 func signatureSchemeToHash(scheme SignatureScheme) (crypto.Hash, error) {
@@ -98,7 +98,7 @@ func signatureSchemeToHash(scheme SignatureScheme) (crypto.Hash, error) {
 		return crypto.SHA384, nil
 	case TLSPSSWithSHA512, TLSECDSAWithP521AndSHA512:
 		return crypto.SHA512, nil
-	case TLSEd25519, TLSDilitihium5r3:
+	case TLSEd25519, TLSMLDSA87:
 		return 0, nil
 	}
 	return 0, errors.New("Unsupported SignatureScheme")
@@ -147,12 +147,12 @@ func NewVerifier(scheme SignatureScheme, pk crypto.PublicKey) (
 			return nil, fmt.Errorf("Expected curve %v, got %v", curve, epk.Curve)
 		}
 		return &ecdsaVerifier{hash: h, pk: epk, scheme: scheme}, nil
-	case TLSDilitihium5r3:
-		dpk, ok := pk.(*dil5.PublicKey)
+	case TLSMLDSA87:
+		dpk, ok := pk.(*mldsa.PublicKey)
 		if !ok {
-			return nil, errors.New("Expected github.com/cloudflare/circl/sign/dilithium/mode5.*PublicKey")
+			return nil, errors.New("Expected *mldsa.PublicKey")
 		}
-		return (*dil5Verifier)(dpk), nil
+		return (*mldsaVerifier)(dpk), nil
 	default:
 		return nil, errors.New("Unsupported SignatureScheme")
 	}
@@ -194,17 +194,17 @@ func UnmarshalVerifier(scheme SignatureScheme, data []byte) (
 			},
 			scheme: scheme,
 		}, nil
-	case TLSDilitihium5r3:
+	case TLSMLDSA87:
 		var (
-			buf [dil5.PublicKeySize]byte
-			pk  dil5.PublicKey
+			buf [mldsa.PublicKeySize]byte
+			pk  mldsa.PublicKey
 		)
-		if len(data) != dil5.PublicKeySize {
-			return nil, errors.New("Wrong length for dilithium5 public key")
+		if len(data) != mldsa.PublicKeySize {
+			return nil, errors.New("Wrong length for ML-DSA-87 public key")
 		}
 		copy(buf[:], data)
 		pk.Unpack(&buf)
-		return (*dil5Verifier)(&pk), nil
+		return (*mldsaVerifier)(&pk), nil
 	default:
 		return nil, errors.New("Unsupported SignatureScheme")
 	}
@@ -217,17 +217,20 @@ type Signer interface {
 	Bytes() []byte
 }
 
-type dil5Signer dil5.PrivateKey
+type mldsaSigner mldsa.PrivateKey
 
-func (s *dil5Signer) Bytes() []byte {
-	var ret [dil5.PrivateKeySize]byte
-	(*dil5.PrivateKey)(s).Pack(&ret)
+func (s *mldsaSigner) Bytes() []byte {
+	var ret [mldsa.PrivateKeySize]byte
+	(*mldsa.PrivateKey)(s).Pack(&ret)
 	return ret[:]
 }
-func (s *dil5Signer) Scheme() SignatureScheme { return TLSDilitihium5r3 }
-func (s *dil5Signer) Sign(msg []byte) []byte {
-	var sig [dil5.SignatureSize]byte
-	dil5.SignTo((*dil5.PrivateKey)(s), msg, sig[:])
+func (s *mldsaSigner) Scheme() SignatureScheme { return TLSMLDSA87 }
+func (s *mldsaSigner) Sign(msg []byte) []byte {
+	var sig [mldsa.SignatureSize]byte
+	err := mldsa.SignTo((*mldsa.PrivateKey)(s), msg, nil, false, sig[:])
+	if err != nil {
+		return nil
+	}
 	return sig[:]
 }
 
@@ -239,17 +242,17 @@ func UnmarshalSigner(scheme SignatureScheme, data []byte) (
 	}
 
 	switch scheme {
-	case TLSDilitihium5r3:
+	case TLSMLDSA87:
 		var (
-			buf [dil5.PrivateKeySize]byte
-			sk  dil5.PrivateKey
+			buf [mldsa.PrivateKeySize]byte
+			sk  mldsa.PrivateKey
 		)
-		if len(data) != dil5.PrivateKeySize {
-			return nil, errors.New("Wrong length for dilithium5 private key")
+		if len(data) != mldsa.PrivateKeySize {
+			return nil, errors.New("Wrong length for ML-DSA private key")
 		}
 		copy(buf[:], data)
 		sk.Unpack(&buf)
-		return (*dil5Signer)(&sk), nil
+		return (*mldsaSigner)(&sk), nil
 	default:
 		return nil, errors.New("Unsupported SignatureScheme")
 	}
@@ -262,12 +265,12 @@ func GenerateSigningKeypair(scheme SignatureScheme) (Signer, Verifier, error) {
 	}
 
 	switch scheme {
-	case TLSDilitihium5r3:
-		pk, sk, err := dil5.GenerateKey(nil)
+	case TLSMLDSA87:
+		pk, sk, err := mldsa.GenerateKey(nil)
 		if err != nil {
 			return nil, nil, err
 		}
-		return (*dil5Signer)(sk), (*dil5Verifier)(pk), nil
+		return (*mldsaSigner)(sk), (*mldsaVerifier)(pk), nil
 	default:
 		return nil, nil, errors.New("Unsupported SignatureScheme")
 	}
@@ -289,8 +292,8 @@ func (s SignatureScheme) String() string {
 		return "p521"
 	case TLSEd25519:
 		return "ed25519"
-	case TLSDilitihium5r3:
-		return "dilithium5"
+	case TLSMLDSA87:
+		return "ml-dsa-87"
 	}
 	return fmt.Sprintf("unknown:%d", uint16(s))
 }
@@ -309,8 +312,8 @@ func SignatureSchemeFromString(s string) SignatureScheme {
 		return TLSECDSAWithP384AndSHA384
 	case "p521":
 		return TLSECDSAWithP521AndSHA512
-	case "dilithium5":
-		return TLSDilitihium5r3
+	case "ml-dsa-87":
+		return TLSMLDSA87
 	case "ed25519":
 		return TLSEd25519
 	}
@@ -338,8 +341,8 @@ func SignatureSchemesFor(pk crypto.PublicKey) []SignatureScheme {
 		return []SignatureScheme{}
 	case ed25519.PublicKey:
 		return []SignatureScheme{TLSEd25519}
-	case *dil5.PublicKey:
-		return []SignatureScheme{TLSDilitihium5r3}
+	case *mldsa.PublicKey:
+		return []SignatureScheme{TLSMLDSA87}
 	}
 	return []SignatureScheme{}
 }