diff --git a/Gemfile b/Gemfile
index 1bccf29..57d125d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -31,3 +31,6 @@ gem "wdm", "~> 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]
 # Lock `http_parser.rb` gem to `v0.6.x` on JRuby builds since newer versions of the gem
 # do not have a Java counterpart.
 gem "http_parser.rb", "~> 0.6.0", :platforms => [:jruby]
+
+# sitemap, cf. https://github.com/jekyll/jekyll-sitemap
+gem 'jekyll-sitemap'
diff --git a/_config.yml b/_config.yml
index 530d2ce..c00579d 100644
--- a/_config.yml
+++ b/_config.yml
@@ -30,6 +30,7 @@ github_username:  rjoberon
 theme: minima
 plugins:
   - jekyll-feed
+  - jekyll-sitemap
 
 # Exclude from processing.
 # The following items will not be processed, by default.