diff --git a/gitignore b/gitignore
index 27cc8ca..cd3dedb 100755
--- a/gitignore
+++ b/gitignore
@@ -8,6 +8,9 @@ TODO
 # for bundler
 .bundle
 
+# for npm
+node_modules
+
 # for yard
 .yardoc
 
@@ -24,4 +27,4 @@ custom_plan.rb
 zeus.json
 
 # for rspec (e.g. .rspec-tm)
-.rspec*
\ No newline at end of file
+.rspec*