diff --git a/Gemfile b/Gemfile
index c4d735e3..5a7afacb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,4 @@
 source "https://rubygems.org"
 
-gem 'jekyll', '~> 3'
-gem 'kramdown', '~> 1'
-gem 'jekyll-sitemap', '~> 1'
+gem 'jekyll', '3.8.4'
+gem 'jekyll-sitemap', '1.2.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index e2abe38d..72233d89 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,13 +8,13 @@ GEM
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
-    eventmachine (1.2.5)
-    ffi (1.9.23)
+    eventmachine (1.2.7)
+    ffi (1.9.25)
     forwardable-extended (2.6.0)
     http_parser.rb (0.6.0)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    jekyll (3.7.3)
+    jekyll (3.8.4)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
@@ -31,10 +31,10 @@ GEM
       sass (~> 3.4)
     jekyll-sitemap (1.2.0)
       jekyll (~> 3.3)
-    jekyll-watch (2.0.0)
+    jekyll-watch (2.1.2)
       listen (~> 3.0)
-    kramdown (1.16.2)
-    liquid (4.0.0)
+    kramdown (1.17.0)
+    liquid (4.0.1)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
@@ -42,14 +42,14 @@ GEM
     mercenary (0.3.6)
     pathutil (0.16.1)
       forwardable-extended (~> 2.6)
-    public_suffix (3.0.2)
+    public_suffix (3.0.3)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
-    rouge (3.1.1)
+    rouge (3.3.0)
     ruby_dep (1.5.0)
     safe_yaml (1.0.4)
-    sass (3.5.5)
+    sass (3.6.0)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -59,9 +59,8 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  jekyll (~> 3)
-  jekyll-sitemap (~> 1)
-  kramdown (~> 1)
+  jekyll (= 3.8.4)
+  jekyll-sitemap (= 1.2.0)
 
 BUNDLED WITH
    1.16.1
diff --git a/README.md b/README.md
index cda99953..826754ab 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ bundle install
 To build and serve this website locally, run:
 
 ```sh
-jekyll serve --safe
+jekyll serve
 ```
 
 ## License
diff --git a/_config.yml b/_config.yml
index 527a8a58..1396b72f 100644
--- a/_config.yml
+++ b/_config.yml
@@ -1,7 +1,6 @@
 title: The Lounge &mdash; Self-hosted web IRC client
 description: "The official website for The Lounge, the self-hosted web IRC client."
 baseurl: ""
-markdown: kramdown
 plugins:
   - jekyll-sitemap
 collections: