diff --git a/bin/build b/bin/build
index c76dd7c3..a01a1b9f 100755
--- a/bin/build
+++ b/bin/build
@@ -24,9 +24,10 @@ mv ./$BUILD_DIR/xterm.temp.js ./$BUILD_DIR/xterm.js
 # Resolve the chain of sourcemaps so that ./$BUILD_DIR/xterm.js.map points at ./src
 sorcery -i $BUILD_DIR/xterm.js
 
-# Copy all CSS files from src/ to $BUILD_DIR/
+# Copy all CSS files from src/ to $BUILD_DIR/ and lib/
 cd src
 find . -name '*.css' | cpio -pdm ../$BUILD_DIR
+find . -name '*.css' | cpio -pdm ../lib
 cd ..
 
 # Copy addons from lib/ to $BUILD_DIR/
diff --git a/package.json b/package.json
index 54bb502d..fe1c8d96 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,26 @@
   "repository": "https://github.com/sourcelair/xterm.js",
   "license": "MIT",
   "files": [
-    "lib"
+    "dist/*.css",
+    "dist/**/*.css",
+    "dist/*.js",
+    "dist/*.js.map",
+    "dist/**/*.js",
+    "dist/**/*.js.map",
+    "lib/*.css",
+    "lib/**/*.css",
+    "lib/*.js",
+    "lib/*.js.map",
+    "lib/**/*.js",
+    "lib/**/*.js.map",
+    "src/*.css",
+    "src/**/*.css",
+    "src/*.js",
+    "src/*.js.map",
+    "src/*.ts",
+    "src/**/*.js",
+    "src/**/*.js.map",
+    "src/**/*.ts"
   ],
   "devDependencies": {
     "@types/chai": "^3.4.34",