diff --git a/lib/bcoin/bip70/x509.js b/lib/bcoin/bip70/x509.js
index 2c528eac..ba30babc 100644
--- a/lib/bcoin/bip70/x509.js
+++ b/lib/bcoin/bip70/x509.js
@@ -49,12 +49,13 @@ x509.getCAName = function getCAName(cert) {
 };
 
 x509.setTrust = function setTrust(certs) {
-  var keys = Object.keys(certs);
-  var i, key, cert, pem, fingerprint, hash, trust;
+  var i, cert, pem, fingerprint, hash, trust;
 
-  for (i = 0; i < keys.length; i++) {
-    key = keys[i];
-    cert = certs[key];
+  if (!Array.isArray(certs))
+    certs = [certs];
+
+  for (i = 0; i < certs.length; i++) {
+    cert = certs[i];
 
     if (typeof cert === 'string') {
       pem = asn1.fromPEM(cert);
@@ -70,6 +71,9 @@ x509.setTrust = function setTrust(certs) {
     fingerprint = utils.sha256(cert.raw);
     hash = fingerprint.toString('hex');
 
+    if (x509.trusted[hash])
+      continue;
+
     trust = {
       name: x509.getCAName(cert),
       fingerprint: fingerprint