diff --git a/Gemfile b/Gemfile
index e8a7006386e7ce6b8920b6d6e4283d0d833455d8..c99d6dd1146f031725734b03b147dcc37043f790 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,3 @@
-source 'https://rubygems.org'
+source "https://rubygems.org"
 
-gem 'jekyll'
+gem "jekyll"
diff --git a/Gemfile.lock b/Gemfile.lock
index 44b8aa1236e1598bc9705d8928048105c521533f..1e4cef54867a7064dc04c15510ab927f147da64a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,7 +4,7 @@ GEM
     addressable (2.6.0)
       public_suffix (>= 2.0.2, < 4.0)
     colorator (1.1.0)
-    concurrent-ruby (1.1.4)
+    concurrent-ruby (1.1.5)
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
@@ -29,10 +29,10 @@ GEM
       safe_yaml (~> 1.0)
     jekyll-sass-converter (1.5.2)
       sass (~> 3.4)
-    jekyll-watch (2.1.2)
+    jekyll-watch (2.2.1)
       listen (~> 3.0)
     kramdown (1.17.0)
-    liquid (4.0.1)
+    liquid (4.0.3)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
@@ -46,8 +46,8 @@ GEM
       ffi (~> 1.0)
     rouge (3.3.0)
     ruby_dep (1.5.0)
-    safe_yaml (1.0.4)
-    sass (3.7.3)
+    safe_yaml (1.0.5)
+    sass (3.7.4)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)