diff --git a/.gitignore b/.gitignore
index 2fb4e7e6..bd011495 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,4 @@ example/*.log
 docs/
 npm-debug.log
 /.idea/
+typings/
diff --git a/bin/build b/bin/build
index 8ec5cbdf..f30496cd 100755
--- a/bin/build
+++ b/bin/build
@@ -1,5 +1,7 @@
 #! /usr/bin/env sh
 
+typings install
+
 mkdir -p build
 browserify src/xterm.js --standalone Terminal -p [ tsify ] --outfile build/xterm.js
 cp src/xterm.css build/xterm.css