diff --git a/github/github-accessors.go b/github/github-accessors.go
index 9c435048ae..1a9f32ef05 100644
--- a/github/github-accessors.go
+++ b/github/github-accessors.go
@@ -4022,6 +4022,14 @@ func (c *CreateRunnerGroupRequest) GetVisibility() string {
 	return *c.Visibility
 }
 
+// GetCanAdminsBypass returns the CanAdminsBypass field if it's non-nil, zero value otherwise.
+func (c *CreateUpdateEnvironment) GetCanAdminsBypass() bool {
+	if c == nil || c.CanAdminsBypass == nil {
+		return false
+	}
+	return *c.CanAdminsBypass
+}
+
 // GetDeploymentBranchPolicy returns the DeploymentBranchPolicy field.
 func (c *CreateUpdateEnvironment) GetDeploymentBranchPolicy() *BranchPolicy {
 	if c == nil {
diff --git a/github/github-accessors_test.go b/github/github-accessors_test.go
index 5091cc46c9..039c3e17b0 100644
--- a/github/github-accessors_test.go
+++ b/github/github-accessors_test.go
@@ -4725,6 +4725,16 @@ func TestCreateRunnerGroupRequest_GetVisibility(tt *testing.T) {
 	c.GetVisibility()
 }
 
+func TestCreateUpdateEnvironment_GetCanAdminsBypass(tt *testing.T) {
+	var zeroValue bool
+	c := &CreateUpdateEnvironment{CanAdminsBypass: &zeroValue}
+	c.GetCanAdminsBypass()
+	c = &CreateUpdateEnvironment{}
+	c.GetCanAdminsBypass()
+	c = nil
+	c.GetCanAdminsBypass()
+}
+
 func TestCreateUpdateEnvironment_GetDeploymentBranchPolicy(tt *testing.T) {
 	c := &CreateUpdateEnvironment{}
 	c.GetDeploymentBranchPolicy()
diff --git a/github/repos_environments.go b/github/repos_environments.go
index 7f01be6277..2399a42c74 100644
--- a/github/repos_environments.go
+++ b/github/repos_environments.go
@@ -148,11 +148,15 @@ func (s *RepositoriesService) GetEnvironment(ctx context.Context, owner, repo, n
 
 // MarshalJSON implements the json.Marshaler interface.
 // As the only way to clear a WaitTimer is to set it to 0, a missing WaitTimer object should default to 0, not null.
+// As the default value for CanAdminsBypass is true, a nil value here marshals to true.
 func (c *CreateUpdateEnvironment) MarshalJSON() ([]byte, error) {
 	type Alias CreateUpdateEnvironment
 	if c.WaitTimer == nil {
 		c.WaitTimer = Int(0)
 	}
+	if c.CanAdminsBypass == nil {
+		c.CanAdminsBypass = Bool(true)
+	}
 	return json.Marshal(&struct {
 		*Alias
 	}{
@@ -167,6 +171,7 @@ func (c *CreateUpdateEnvironment) MarshalJSON() ([]byte, error) {
 type CreateUpdateEnvironment struct {
 	WaitTimer              *int            `json:"wait_timer"`
 	Reviewers              []*EnvReviewers `json:"reviewers"`
+	CanAdminsBypass        *bool           `json:"can_admins_bypass"`
 	DeploymentBranchPolicy *BranchPolicy   `json:"deployment_branch_policy"`
 }
 
diff --git a/github/repos_environments_test.go b/github/repos_environments_test.go
index a688b221fc..0f93d29088 100644
--- a/github/repos_environments_test.go
+++ b/github/repos_environments_test.go
@@ -93,7 +93,7 @@ func TestCreateUpdateEnvironment_MarshalJSON(t *testing.T) {
 		t.Errorf("MarshalJSON: %v", err)
 	}
 
-	want := `{"wait_timer":0,"reviewers":null,"deployment_branch_policy":null}`
+	want := `{"wait_timer":0,"reviewers":null,"can_admins_bypass":true,"deployment_branch_policy":null}`
 	if string(got) != want {
 		t.Errorf("MarshalJSON = %s, want %v", got, want)
 	}
@@ -187,7 +187,7 @@ func TestRepositoriesService_CreateEnvironment(t *testing.T) {
 		json.NewDecoder(r.Body).Decode(v)
 
 		testMethod(t, r, "PUT")
-		want := &CreateUpdateEnvironment{WaitTimer: Int(30)}
+		want := &CreateUpdateEnvironment{WaitTimer: Int(30), CanAdminsBypass: Bool(true)}
 		if !cmp.Equal(v, want) {
 			t.Errorf("Request body = %+v, want %+v", v, want)
 		}