diff --git a/src/lib/WebAuthn/WebAuthnException.php b/src/lib/WebAuthn/WebAuthnException.php
new file mode 100644
index 0000000..f27eeec
--- /dev/null
+++ b/src/lib/WebAuthn/WebAuthnException.php
@@ -0,0 +1,28 @@
+<?php
+namespace lbuchs\WebAuthn;
+
+/**
+ * @author Lukas Buchs
+ * @license https://github.com/lbuchs/WebAuthn/blob/master/LICENSE MIT
+ */
+class WebAuthnException extends \Exception {
+    const INVALID_DATA = 1;
+    const INVALID_TYPE = 2;
+    const INVALID_CHALLENGE = 3;
+    const INVALID_ORIGIN = 4;
+    const INVALID_RELYING_PARTY = 5;
+    const INVALID_SIGNATURE = 6;
+    const INVALID_PUBLIC_KEY = 7;
+    const CERTIFICATE_NOT_TRUSTED = 8;
+    const USER_PRESENT = 9;
+    const USER_VERIFICATED = 10;
+    const SIGNATURE_COUNTER = 11;
+    const CRYPTO_STRONG = 13;
+    const BYTEBUFFER = 14;
+    const CBOR = 15;
+    const ANDROID_NOT_TRUSTED = 16;
+
+    public function __construct($message = "", $code = 0, $previous = null) {
+        parent::__construct($message, $code, $previous);
+    }
+}