diff --git a/.npmignore b/.npmignore
index 4a44df3f3..08210e2d7 100644
--- a/.npmignore
+++ b/.npmignore
@@ -1,6 +1,7 @@
 .*
 *.custom.*
 *.d.ts
+CONTRIBUTING.md
 doc/*.php
 node_modules/
 perf/*.html
@@ -12,8 +13,8 @@ test/*.sh
 vendor/*.gz
 vendor/backbone/
 vendor/benchmark.js/*.jar
-vendor/closure-compiler
-vendor/docdown
+vendor/closure-compiler/
+vendor/docdown/
 vendor/firebug-lite/
 vendor/json3/
 vendor/jquery/
@@ -21,5 +22,5 @@ vendor/qunit/qunit/*.css
 vendor/qunit/qunit/*-1.8.0.js
 vendor/requirejs/
 vendor/underscore/*-min.js
-vendor/uglifyjs
+vendor/uglifyjs/
 vendor/underscore/test/