1 files changed, 1 insertions, 0 deletions
diff --git a/Gemfile b/Gemfile
index 0b264912..6537c060 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,3 +3,4 @@ source "https://rubygems.org"
 git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
 
 gem "jekyll", "~> 4.0"
+gem "jekyll-last-modified-at"