diff --git a/lib/socket.js b/lib/socket.js
index c7e4d91c4..953e34c1a 100644
--- a/lib/socket.js
+++ b/lib/socket.js
@@ -9,7 +9,6 @@ var toArray = require('to-array');
 var on = require('./on');
 var bind = require('component-bind');
 var debug = require('debug')('socket.io-client:socket');
-var hasBin = require('has-binary');
 
 /**
  * Module exports.
@@ -138,9 +137,7 @@ Socket.prototype.emit = function (ev) {
   }
 
   var args = toArray(arguments);
-  var parserType = parser.EVENT; // default
-  if (hasBin(args)) { parserType = parser.BINARY_EVENT; } // binary
-  var packet = { type: parserType, data: args };
+  var packet = { type: parser.EVENT, data: args };
 
   packet.options = {};
   packet.options.compress = !this.flags || false !== this.flags.compress;
@@ -289,9 +286,8 @@ Socket.prototype.ack = function (id) {
     var args = toArray(arguments);
     debug('sending ack %j', args);
 
-    var type = hasBin(args) ? parser.BINARY_ACK : parser.ACK;
     self.packet({
-      type: type,
+      type: parser.ACK,
       id: id,
       data: args
     });
diff --git a/package.json b/package.json
index 33b6a154b..efbfb5a50 100644
--- a/package.json
+++ b/package.json
@@ -21,12 +21,11 @@
     "component-emitter": "1.2.1",
     "debug": "2.3.3",
     "engine.io-client": "2.0.2",
-    "has-binary": "0.1.7",
     "has-cors": "1.1.0",
     "indexof": "0.0.1",
     "object-component": "0.0.3",
     "parseuri": "0.0.5",
-    "socket.io-parser": "2.3.2",
+    "socket.io-parser": "~3.1.1",
     "to-array": "0.1.4"
   },
   "devDependencies": {