diff --git a/src/endorse-certificate.h b/src/endorse-certificate.h
index 3b992c4..1b9b897 100644
--- a/src/endorse-certificate.h
+++ b/src/endorse-certificate.h
@@ -57,16 +57,14 @@
 public:
   EndorseCertificate() {}
 
+  // EndorseCertificate(const ndn::security::IdentityCertificate& kskCertificate);
+
   EndorseCertificate(const ndn::security::IdentityCertificate& kskCertificate,
-                     const ndn::Time& notBefore,
-                     const ndn::Time& notAfter,
                      ndn::Ptr<ProfileData> profileData,
-                     const std::vector<std::string>& endorseList);
+                     const std::vector<std::string>& endorseList = std::vector<std::string>());
 
   EndorseCertificate(const EndorseCertificate& endorseCertificate,
                      const ndn::Name& signer,
-                     const ndn::Time& notBefore,
-                     const ndn::Time& notAfter,
                      const std::vector<std::string>& endorseList);
 
   EndorseCertificate(const EndorseCertificate& endorseCertificate);