diff --git a/old_docs/Gemfile b/old_docs/Gemfile
index 4596ba02..ba113660 100644
--- a/old_docs/Gemfile
+++ b/old_docs/Gemfile
@@ -1,8 +1,8 @@
 source 'https://rubygems.org'
 gem 'github-pages', '>= 232'
 gem 'rouge'
-gem "jekyll", ">= 3.10.0"
+gem "jekyll", ">= 4.0.0"
 gem "ffi", ">= 1.17.1"
 gem "nokogiri", ">= 1.18.5"
 gem "yajl-ruby", ">= 1.4.3"
-gem "kramdown", ">= 2.4.0"
+gem "kramdown", ">= 2.5.0"