diff --git a/src/Unirest/Method.php b/src/Unirest/Method.php
index 0076a31..bd2df20 100644
--- a/src/Unirest/Method.php
+++ b/src/Unirest/Method.php
@@ -1,12 +1,78 @@
 <?php
 
+/**
+ * Hypertext Transfer Protocol (HTTP) Method Registry
+ *
+ * http://www.iana.org/assignments/http-methods/http-methods.xhtml
+ */
+
 namespace Unirest;
 
 interface Method
 {
-    const DELETE = 'DELETE';
+    // RFC7231
     const GET = 'GET';
-    const PATCH = 'PATCH';
+    const HEAD = 'HEAD';
     const POST = 'POST';
     const PUT = 'PUT';
+    const DELETE = 'DELETE';
+    const CONNECT = 'CONNECT';
+    const OPTIONS = 'OPTIONS';
+    const TRACE = 'TRACE';
+
+    // RFC3744
+    const ACL = 'ACL';
+
+    // RFC3253
+    const BASELINE = 'BASELINE';
+
+    // RFC2068
+    const LINK = 'LINK';
+    const UNLINK = 'UNLINK';
+
+    // RFC3253
+    const MERGE = 'MERGE';
+    const BASELINECONTROL = 'BASELINE-CONTROL';
+    const MKACTIVITY = 'MKACTIVITY';
+    const VERSIONCONTROL = 'VERSION-CONTROL';
+    const REPORT = 'REPORT';
+    const CHECKOUT = 'CHECKOUT';
+    const CHECKIN = 'CHECKIN';
+    const UNCHECKOUT = 'UNCHECKOUT';
+    const MKWORKSPACE = 'MKWORKSPACE';
+    const UPDATE = 'UPDATE';
+    const LABEL = 'LABEL';
+
+    // RFC3648
+    const ORDERPATCH = 'ORDERPATCH';
+
+    // RFC3744
+    const ACL = 'ACL';
+
+    // RFC4437
+    const MKREDIRECTREF = 'MKREDIRECTREF';
+    const UPDATEREDIRECTREF = 'UPDATEREDIRECTREF';
+
+    // RFC4791
+    const MKCALENDAR = 'MKCALENDAR';
+
+    // RFC4918
+    const PROPFIND = 'PROPFIND';
+    const LOCK = 'LOCK';
+    const UNLOCK = 'UNLOCK';
+    const PROPPATCH = 'PROPPATCH';
+    const MKCOL = 'MKCOL';
+    const COPY = 'COPY';
+    const MOVE = 'MOVE';
+
+    // RFC5323
+    const SEARCH = 'SEARCH';
+
+    // RFC5789
+    const PATCH = 'PATCH';
+
+    // RFC5842
+    const BIND = 'BIND';
+    const UNBIND = 'UNBIND';
+    const REBIND = 'REBIND';
 }