diff --git a/modules/xmpp/SDPUtil.js b/modules/xmpp/SDPUtil.js
index ad581fc06..e0d2f5d25 100644
--- a/modules/xmpp/SDPUtil.js
+++ b/modules/xmpp/SDPUtil.js
@@ -311,7 +311,13 @@ var SDPUtil = {
         line += ' ';
         line += cand.getAttribute('component');
         line += ' ';
-        line += cand.getAttribute('protocol'); //.toUpperCase(); // chrome M23 doesn't like this
+
+        var protocol = cand.getAttribute('protocol');
+        // use tcp candidates for FF
+        if (RTCBrowserType.isFirefox() && protocol.toLowerCase() == 'ssltcp') {
+            protocol = 'tcp';
+        }
+
         line += ' ';
         line += cand.getAttribute('priority');
         line += ' ';
@@ -338,7 +344,7 @@ var SDPUtil = {
                 }
                 break;
         }
-        if (cand.getAttribute('protocol').toLowerCase() == 'tcp') {
+        if (protocol.toLowerCase() == 'tcp') {
             line += 'tcptype';
             line += ' ';
             line += cand.getAttribute('tcptype');
diff --git a/package.json b/package.json
index 0d3606b2b..c133f3c07 100644
--- a/package.json
+++ b/package.json
@@ -27,9 +27,9 @@
     "jssha": "1.5.0",
     "pako": "*",
     "retry": "0.6.1",
-    "sdp-interop": "0.1.10",
-    "sdp-simulcast": "0.1.2",
-    "sdp-transform": "1.4.1",
+    "sdp-interop": "0.1.11",
+    "sdp-simulcast": "0.1.3",
+    "sdp-transform": "1.5.*",
     "socket.io-client": "1.3.6",
     "strophe": "^1.2.2",
     "strophejs-plugins": "^0.0.6",