diff --git a/Gemfile b/Gemfile
index ca9b7428d0e..a76c33fb51c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,6 +3,6 @@ source "https://rubygems.org"
 gem "github-pages", group: :jekyll_plugins
 
 group :test do
-  gem "html-proofer"
+  gem "html-proofer", "~> 3.19.4"
   gem "rake"
 end