diff --git a/gulpfile.js b/gulpfile.js
index 144b883168..ff4a74382c 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -7,7 +7,6 @@ const sorcery = require('sorcery');
 const source = require('vinyl-source-stream');
 const sourcemaps = require('gulp-sourcemaps');
 const ts = require('gulp-typescript');
-const tsify = require('tsify');
 
 
 let buildDir = process.env.BUILD_DIR || 'build';
@@ -53,7 +52,6 @@ gulp.task('browserify', ['tsc'], function() {
     packageCache: {}
   };
   let bundleStream = browserify(browserifyOptions)
-        .plugin(tsify)
         .bundle()
         .pipe(source('xterm.js'))
         .pipe(buffer())
diff --git a/package.json b/package.json
index 8e81c20475..0ce6ca36b3 100644
--- a/package.json
+++ b/package.json
@@ -56,7 +56,6 @@
     "nodemon": "1.10.2",
     "sleep": "^3.0.1",
     "sorcery": "^0.10.0",
-    "tsify": "^3.0.0",
     "tslint": "^4.0.2",
     "typescript": "^2.0.3",
     "vinyl-buffer": "^1.0.0",