diff --git a/lib/certUtils.js b/lib/certUtils.js
index 6639bb12..a8b602fd 100644
--- a/lib/certUtils.js
+++ b/lib/certUtils.js
@@ -2,16 +2,20 @@ import { ab2str, coerceToArrayBuffer, isPem, pemToBase64, tools } from "./utils.
 
 class Certificate {
 	constructor(cert) {
-		
+		let decoded;
+
 		// Clean up base64 string
 		if (typeof cert === "string" || cert instanceof String) {
-			cert = cert.replace(/\r/g, "");
+			cert = cert.replace(/\r/g, "").trim();
+			decoded = ab2str(coerceToArrayBuffer(cert, "certificate"));
 		}
 
 		if (isPem(cert)) {
 			cert = pemToBase64(cert);
+		} else if (decoded && isPem(decoded)) {
+			cert = pemToBase64(decoded);
 		}
-		
+
 		// Clean up certificate
 		if (typeof cert === "string" || cert instanceof String) {
 			cert = cert.replace(/\n/g, "");
diff --git a/package.json b/package.json
index 22feb223..e03f21a2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "fido2-lib",
-	"version": "3.4.3",
+	"version": "3.4.4",
 	"description": "A library for performing FIDO 2.0 / WebAuthn functionality",
 	"type": "module",
 	"main": "dist/main.cjs",
diff --git a/test/certUtils.test.js b/test/certUtils.test.js
index 0209a7ff..dae0fdc9 100644
--- a/test/certUtils.test.js
+++ b/test/certUtils.test.js
@@ -29,6 +29,12 @@ describe("cert utils", function() {
 				assert.isObject(cert._cert);
 			});
 
+			it("can decode base64 encoded cert", function() {
+				const cert = new Certificate(h.certs.truUCert);
+				assert.instanceOf(cert, Certificate);
+				assert.isObject(cert._cert);
+			});
+
 			it("throws if no arg to constructor", function() {
 				assert.throws(() => {
 					new Certificate();
diff --git a/test/helpers/fido2-helpers.js b/test/helpers/fido2-helpers.js
index 1b6e13da..0e4b358e 100644
--- a/test/helpers/fido2-helpers.js
+++ b/test/helpers/fido2-helpers.js
@@ -3782,11 +3782,14 @@ const tpmAttestation = new Uint8Array([
 	0x3D,
 ]).buffer;
 
+const truUCert = "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";
+
 const certs = {
 	yubiKeyAttestation,
 	yubicoRoot,
 	feitianFido2,
 	tpmAttestation,
+	truUCert,
 };
 
 /** ******************************************************************************