diff --git a/lib/mjsonwp/routes.js b/lib/mjsonwp/routes.js
index 3d3ca9af4..10cbea297 100644
--- a/lib/mjsonwp/routes.js
+++ b/lib/mjsonwp/routes.js
@@ -9,7 +9,7 @@ const METHOD_MAP = {
     GET: {command: 'getStatus'}
   },
   '/wd/hub/session': {
-    POST: {command: 'createSession', payloadParams: {required: ['desiredCapabilities'], optional: ['requiredCapabilities']}}
+    POST: {command: 'createSession', payloadParams: {required: ['desiredCapabilities'], optional: ['requiredCapabilities', 'capabilities']}}
   },
   '/wd/hub/sessions': {
     GET: {command: 'getSessions'}
diff --git a/test/mjsonwp/routes-specs.js b/test/mjsonwp/routes-specs.js
index 948c4f469..39bf222ab 100644
--- a/test/mjsonwp/routes-specs.js
+++ b/test/mjsonwp/routes-specs.js
@@ -38,7 +38,7 @@ describe('MJSONWP', () => {
       }
       var hash = shasum.digest('hex').substring(0, 8);
       // Modify the hash whenever the protocol has intentionally been modified.
-      hash.should.equal('8c54fd6e');
+      hash.should.equal('24791855');
     });
   });