diff --git a/.travis.yml b/.travis.yml
index 252dc5c..4ce14eb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,7 +6,7 @@ rvm:
 - 2.1.3
 script: 
 - bundle exec jekyll build
-- bundle exec htmlproof ./_site
+- bundle exec htmlproof --disable_external ./_site
 notifications:
   slack:
     secure: JKGFMgZK8d97NbArV2cXUYP3LcHXk1MnTyd9QdVknMsFpmWhbthUr+seU9cpg0eSw2lGR406GyMsEawy44kKBF6Xw2ufOQq3T5vxMyhV7xGK2Am6Iaz/DfwkCQsTk3yYR9PaPG7689ZHurc3JXR4LzNiAtBc8o9F1Sb31JeM0IY=