diff --git a/binding.cc b/binding.cc
index f1f9d116..897ef3f5 100644
--- a/binding.cc
+++ b/binding.cc
@@ -1519,7 +1519,9 @@ namespace zmq {
     opts_binary.insert(48); // ZMQ_CURVE_PUBLICKEY
     opts_binary.insert(49); // ZMQ_CURVE_SECRETKEY
     opts_binary.insert(50); // ZMQ_CURVE_SERVERKEY
+    opts_int.insert(51); //ZMQ_PROBE_ROUTER
     opts_binary.insert(55); // ZMQ_ZAP_DOMAIN
+    opts_int.insert(66); //ZMQ_HANDSHAKE_IVL
     #endif
 
     NODE_DEFINE_CONSTANT(target, ZMQ_CAN_DISCONNECT);
diff --git a/package.json b/package.json
index 37b99edc..c6dd9399 100644
--- a/package.json
+++ b/package.json
@@ -10,13 +10,13 @@
   },
   "dependencies": {
     "bindings": "~1.2.1",
-    "nan": "~2.4.0",
+    "nan": "^2.4.0",
     "prebuild": "^4.2.2"
   },
   "devDependencies": {
-    "mocha": "~1.13.0",
-    "semver": "~4.1.1",
-    "should": "2.1.x"
+    "mocha": "^3.1.0",
+    "semver": "^5.3.0",
+    "should": "^11.1.0"
   },
   "engines": {
     "node": ">=0.8"
diff --git a/test/socket.monitor.js b/test/socket.monitor.js
index 0e464432..92f7bf51 100644
--- a/test/socket.monitor.js
+++ b/test/socket.monitor.js
@@ -10,8 +10,7 @@ describe('socket.monitor', function() {
 
   it('should be able to monitor the socket', function(done) {
     var rep = zmq.socket('rep')
-      , req = zmq.socket('req')
-      , events = [];
+      , req = zmq.socket('req');
 
     rep.on('message', function(msg){
       msg.should.be.an.instanceof(Buffer);
@@ -25,14 +24,10 @@ describe('socket.monitor', function() {
         // Test the endpoint addr arg
         event_endpoint_addr.toString().should.equal('tcp://127.0.0.1:5423');
 
-        // If this is a disconnect event we can now close the rep socket
-        if (e === 'disconnect') {
-          rep.close();
-        }
-
         testedEvents.pop();
         if (testedEvents.length === 0) {
           rep.unmonitor();
+          rep.close();
           done();
         }
       });
@@ -62,7 +57,7 @@ describe('socket.monitor', function() {
 
     // We will try to connect to a non-existing server, zmq will issue events: "connect_retry", "close", "connect_retry"
     // The connect_retry will be issued immediately after the close event, so we will measure the time between the close
-    // event and connect_retry event, those should >= 10 (this will tell us that we are reading 1 event at a time from
+    // event and connect_retry event, those should >= 9 (this will tell us that we are reading 1 event at a time from
     // the monitor socket).
 
     var closeTime;
@@ -74,7 +69,7 @@ describe('socket.monitor', function() {
       var diff = Date.now() - closeTime;
       req.unmonitor();
       req.close();
-      diff.should.be.within(10, 20);
+      diff.should.be.within(9, 20);
       done();
     });