diff --git a/github/attestations.go b/github/attestations.go
index 618d5d73f6c..d2212c9caa3 100644
--- a/github/attestations.go
+++ b/github/attestations.go
@@ -17,8 +17,12 @@ type Attestation struct {
 	// The attestation's Sigstore Bundle.
 	// Refer to the sigstore bundle specification for more info:
 	// https://github.com/sigstore/protobuf-specs/blob/main/protos/sigstore_bundle.proto
-	Bundle       json.RawMessage `json:"bundle"`
-	RepositoryID int64           `json:"repository_id"`
+	Bundle json.RawMessage `json:"bundle,omitempty"`
+	// The download URL for the attestation's Sigstore Bundle.
+	BundleURL *string `json:"bundle_url,omitempty"`
+	// The entity that initiated the attestation.
+	Initiator    *string `json:"initiator,omitempty"`
+	RepositoryID int64   `json:"repository_id"`
 }
 
 // AttestationsResponse represents a collection of artifact attestations.
diff --git a/github/github-accessors.go b/github/github-accessors.go
index 952d3d8fea0..ea207847a27 100644
--- a/github/github-accessors.go
+++ b/github/github-accessors.go
@@ -3046,6 +3046,22 @@ func (a *Attestation) GetBundle() json.RawMessage {
 	return a.Bundle
 }
 
+// GetBundleURL returns the BundleURL field if it's non-nil, zero value otherwise.
+func (a *Attestation) GetBundleURL() string {
+	if a == nil || a.BundleURL == nil {
+		return ""
+	}
+	return *a.BundleURL
+}
+
+// GetInitiator returns the Initiator field if it's non-nil, zero value otherwise.
+func (a *Attestation) GetInitiator() string {
+	if a == nil || a.Initiator == nil {
+		return ""
+	}
+	return *a.Initiator
+}
+
 // GetRepositoryID returns the RepositoryID field.
 func (a *Attestation) GetRepositoryID() int64 {
 	if a == nil {
diff --git a/github/github-accessors_test.go b/github/github-accessors_test.go
index 7e9ad6671c9..a797d3f6e26 100644
--- a/github/github-accessors_test.go
+++ b/github/github-accessors_test.go
@@ -3809,6 +3809,28 @@ func TestAttestation_GetBundle(tt *testing.T) {
 	a.GetBundle()
 }
 
+func TestAttestation_GetBundleURL(tt *testing.T) {
+	tt.Parallel()
+	var zeroValue string
+	a := &Attestation{BundleURL: &zeroValue}
+	a.GetBundleURL()
+	a = &Attestation{}
+	a.GetBundleURL()
+	a = nil
+	a.GetBundleURL()
+}
+
+func TestAttestation_GetInitiator(tt *testing.T) {
+	tt.Parallel()
+	var zeroValue string
+	a := &Attestation{Initiator: &zeroValue}
+	a.GetInitiator()
+	a = &Attestation{}
+	a.GetInitiator()
+	a = nil
+	a.GetInitiator()
+}
+
 func TestAttestation_GetRepositoryID(tt *testing.T) {
 	tt.Parallel()
 	a := &Attestation{}
diff --git a/github/orgs_attestations_test.go b/github/orgs_attestations_test.go
index a0ed59c9f0e..fe6107b9725 100644
--- a/github/orgs_attestations_test.go
+++ b/github/orgs_attestations_test.go
@@ -23,7 +23,8 @@ func TestOrganizationsService_ListAttestations(t *testing.T) {
 			"attestations": [
 				{
 					"repository_id": 1,
-					"bundle": {}
+					"bundle_url": "https://example.com/bundle.json",
+					"initiator": "octocat"
 				},
 				{
 					"repository_id": 2,
@@ -42,7 +43,8 @@ func TestOrganizationsService_ListAttestations(t *testing.T) {
 		Attestations: []*Attestation{
 			{
 				RepositoryID: 1,
-				Bundle:       []byte(`{}`),
+				BundleURL:    new("https://example.com/bundle.json"),
+				Initiator:    new("octocat"),
 			},
 			{
 				RepositoryID: 2,
diff --git a/github/repos_attestations_test.go b/github/repos_attestations_test.go
index cc522c3ce86..48e10252670 100644
--- a/github/repos_attestations_test.go
+++ b/github/repos_attestations_test.go
@@ -23,7 +23,8 @@ func TestRepositoriesService_ListAttestations(t *testing.T) {
 			"attestations": [
 				{
 					"repository_id": 1,
-					"bundle": {}
+					"bundle_url": "https://example.com/bundle.json",
+					"initiator": "octocat"
 				},
 				{
 					"repository_id": 2,
@@ -42,7 +43,8 @@ func TestRepositoriesService_ListAttestations(t *testing.T) {
 		Attestations: []*Attestation{
 			{
 				RepositoryID: 1,
-				Bundle:       []byte(`{}`),
+				BundleURL:    new("https://example.com/bundle.json"),
+				Initiator:    new("octocat"),
 			},
 			{
 				RepositoryID: 2,
diff --git a/github/users_attestations_test.go b/github/users_attestations_test.go
index 347af245f8a..3b43d8bca5b 100644
--- a/github/users_attestations_test.go
+++ b/github/users_attestations_test.go
@@ -23,7 +23,8 @@ func TestUsersService_ListAttestations(t *testing.T) {
 			"attestations": [
 				{
 					"repository_id": 1,
-					"bundle": {}
+					"bundle_url": "https://example.com/bundle.json",
+					"initiator": "octocat"
 				},
 				{
 					"repository_id": 2,
@@ -42,7 +43,8 @@ func TestUsersService_ListAttestations(t *testing.T) {
 		Attestations: []*Attestation{
 			{
 				RepositoryID: 1,
-				Bundle:       []byte(`{}`),
+				BundleURL:    new("https://example.com/bundle.json"),
+				Initiator:    new("octocat"),
 			},
 			{
 				RepositoryID: 2,