diff --git a/script/proof b/script/proof
index 53157231..d491fdc5 100755
--- a/script/proof
+++ b/script/proof
@@ -15,6 +15,6 @@ command -v htmlproof || {
     gem install html-proofer -- --use-system-libraries
 }
 
-jekyll build -s site -d _site --trace
+bundle exec jekyll build -s site -d _site --trace
 echo -e "\e[0;36mProofing begins now!\e[0m\n"
 htmlproof ./_site