diff --git a/src/types.ts b/src/types.ts
index 0e0d47a..af1c3e7 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -52,9 +52,9 @@ export interface SubjectAltName {
 }
 
 export interface CertificateOptions {
-  hostCertCN: string
   domain: string
   rootCA: { certificate: string, privateKey: string }
+  hostCertCN?: string
   altNameIPs?: string[]
   altNameURIs?: string[]
   validityDays?: number