diff --git a/Gemfile b/Gemfile
index 86fea7f..ac08269 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,7 +12,7 @@ gem "jekyll", "~> 4.3.2"
 gem "minima", "~> 2.5"
 # If you want to use GitHub Pages, remove the "gem "jekyll"" above and
 # uncomment the line below. To upgrade, run `bundle update github-pages`.
-gem "github-pages", group: :jekyll_plugins
+gem "github-pages", "~> 231", group: :jekyll_plugins
 gem "jekyll-include-cache", group: :jekyll_plugins
 
 # If you have any plugins, put them here!