diff --git a/.travis.yml b/.travis.yml
index 839e700..1b3b8ef 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,11 +1,14 @@
 language: ruby
 rvm:
   - 2.2.2
+addons:
+  apt:
+    packages:
+    - libcurl4-openssl-dev # required to avoid SSL errors
 sudo: false
 script:
   - bundle exec jekyll build
   - bundle exec htmlproofer '_site/' --allow-hash-href --check-html --http-status-ignore 0
-
 env:
   global:
     - NOKOGIRI_USE_SYSTEM_LIBRARIES=true # speeds up installation of html-proofer