diff --git a/Gemfile.lock b/Gemfile.lock
index 0dfd102a1..5887fa06d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,9 +1,9 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.8.0)
-      public_suffix (>= 2.0.2, < 5.0)
-    asciidoctor (2.0.17)
+    addressable (2.8.5)
+      public_suffix (>= 2.0.2, < 6.0)
+    asciidoctor (2.0.20)
     colorator (1.1.0)
     concurrent-ruby (1.2.2)
     em-websocket (0.5.3)
@@ -19,7 +19,7 @@ GEM
       ruby2_keywords (>= 0.0.4)
     faraday-net_http (2.0.3)
     fastimage (2.2.6)
-    ffi (1.15.5)
+    ffi (1.16.3)
     forwardable-extended (2.6.0)
     html-proofer (3.19.4)
       addressable (~> 2.3)
@@ -30,13 +30,13 @@ GEM
       typhoeus (~> 1.3)
       yell (~> 2.0)
     http_parser.rb (0.8.0)
-    i18n (0.9.5)
+    i18n (1.14.1)
       concurrent-ruby (~> 1.0)
-    jekyll (3.9.1)
+    jekyll (3.9.3)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
-      i18n (~> 0.7)
+      i18n (>= 0.7, < 2)
       jekyll-sass-converter (~> 1.0)
       jekyll-watch (~> 2.0)
       kramdown (>= 1.17, < 3)
@@ -45,8 +45,8 @@ GEM
       pathutil (~> 0.9)
       rouge (>= 1.7, < 4)
       safe_yaml (~> 1.0)
-    jekyll-asciidoc (3.0.0)
-      asciidoctor (>= 1.5.0)
+    jekyll-asciidoc (3.0.1)
+      asciidoctor (>= 1.5.0, < 3.0.0)
       jekyll (>= 3.0.0)
     jekyll-assets (2.3.2)
       concurrent-ruby (~> 1.0)
@@ -67,12 +67,12 @@ GEM
       nuggets
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    kramdown (2.3.1)
+    kramdown (2.4.0)
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
-    liquid (4.0.3)
-    listen (3.7.1)
+    liquid (4.0.4)
+    listen (3.8.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
@@ -87,15 +87,15 @@ GEM
     parallel (1.22.1)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (4.0.7)
+    public_suffix (5.0.3)
     racc (1.6.1)
     rack (1.6.13)
     rainbow (3.1.1)
-    rb-fsevent (0.11.0)
+    rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.5)
-    rouge (3.27.0)
+    rexml (3.2.6)
+    rouge (3.30.0)
     ruby2_keywords (0.0.5)
     safe_yaml (1.0.5)
     sass (3.7.4)