diff --git a/.gitignore b/.gitignore
index b129a03..26f203e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@ cdp-*.log
 cdp-*.txt
 
 coverage.out
+massif.out
 
 # binaries
 /chromedp-gen
diff --git a/.travis.yml b/.travis.yml
index 636e78e..b8f3227 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,5 @@
 language: go
+sudo: false
 go:
   - 1.7
   - 1.8