diff --git a/Gemfile b/Gemfile
index 6ac80f6..f5d126b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,17 +1,17 @@
 source "https://rubygems.org"
 ruby RUBY_VERSION
 
-gem "jekyll", "3.4.3"
+gem "jekyll", "3.9.0"
 
 # to use GitHub Pages
 # gem "github-pages", group: :jekyll_plugins
 
 # If you have any plugins, put them here!
 group :jekyll_plugins do
-   gem "jekyll-feed"
-   gem "jekyll-sitemap"
-   gem "jekyll-redirect-from"
-   gem "jekyll-seo-tag"
+   gem "jekyll-feed", ">= 0.9.2"
+   gem "jekyll-sitemap", ">= 1.1.1"
+   gem "jekyll-redirect-from", ">= 0.12.1"
+   gem "jekyll-seo-tag", ">= 2.2.2"
 end
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem