diff --git a/.travis.yml b/.travis.yml
index d02187f..f2cce11 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,8 +12,11 @@ install:
 
 addons:
   apt:
+    sources:
+      - sourceline: "ppa:rmescandon/yq"
     packages:
-    - libcurl4-openssl-dev # required to avoid SSL error (for htmlproofer)
+      - libcurl4-openssl-dev # required to avoid SSL error (for htmlproofer)
+      - yq
 
 script:
   - >-
@@ -40,4 +43,4 @@ notifications:
 
 env:
   global:
-    - NOKOGIRI_USE_SYSTEM_LIBRARIES=true # speeds up installation of html-proofer
\ No newline at end of file
+    - NOKOGIRI_USE_SYSTEM_LIBRARIES=true # speeds up installation of html-proofer