diff --git a/Gemfile.lock b/Gemfile.lock
index 8e9783c..af71796 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -15,10 +15,10 @@ GEM
     colorator (1.1.0)
     commonmarker (0.17.13)
       ruby-enum (~> 0.5)
-    concurrent-ruby (1.1.5)
+    concurrent-ruby (1.1.8)
     dnsruby (1.61.2)
       addressable (~> 2.5)
-    em-websocket (0.5.1)
+    em-websocket (0.5.2)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
     ethon (0.11.0)
@@ -27,7 +27,7 @@ GEM
     execjs (2.7.0)
     faraday (0.15.4)
       multipart-post (>= 1.2, < 3)
-    ffi (1.9.25)
+    ffi (1.15.0)
     forwardable-extended (2.6.0)
     gemoji (3.0.0)
     github-pages (193)
@@ -85,7 +85,7 @@ GEM
       activesupport (>= 2)
       nokogiri (>= 1.4)
     http_parser.rb (0.6.0)
-    i18n (1.6.0)
+    i18n (0.9.5)
       concurrent-ruby (~> 1.0)
     jekyll (3.7.4)
       addressable (~> 2.4)
@@ -105,9 +105,9 @@ GEM
     jekyll-coffeescript (1.1.1)
       coffee-script (~> 2.2)
       coffee-script-source (~> 1.11.1)
-    jekyll-commonmark (1.2.0)
+    jekyll-commonmark (1.3.1)
       commonmarker (~> 0.14)
-      jekyll (>= 3.0, < 4.0)
+      jekyll (>= 3.7, < 5.0)
     jekyll-commonmark-ghpages (0.1.5)
       commonmarker (~> 0.17.6)
       jekyll-commonmark (~> 1)
@@ -185,7 +185,7 @@ GEM
       jekyll-seo-tag (~> 2.0)
     jekyll-titles-from-headings (0.5.1)
       jekyll (~> 3.3)
-    jekyll-watch (2.1.2)
+    jekyll-watch (2.2.1)
       listen (~> 3.0)
     jemoji (0.10.1)
       gemoji (~> 3.0)
@@ -198,30 +198,32 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
     mercenary (0.3.6)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.5.1)
     minima (2.5.0)
       jekyll (~> 3.5)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
-    minitest (5.11.3)
+    minitest (5.14.4)
     multipart-post (2.0.0)
-    nokogiri (1.10.4)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.11.4)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     octokit (4.13.0)
       sawyer (~> 0.8.0, >= 0.5.3)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (2.0.5)
-    rb-fsevent (0.10.3)
-    rb-inotify (0.9.10)
-      ffi (>= 0.5.0, < 2)
+    racc (1.5.2)
+    rb-fsevent (0.11.0)
+    rb-inotify (0.10.1)
+      ffi (~> 1.0)
     rouge (2.2.1)
-    ruby-enum (0.7.2)
+    ruby-enum (0.9.0)
       i18n
     ruby_dep (1.5.0)
     rubyzip (1.2.2)
-    safe_yaml (1.0.4)
-    sass (3.7.2)
+    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)
@@ -234,7 +236,7 @@ GEM
     thread_safe (0.3.6)
     typhoeus (1.3.1)
       ethon (>= 0.9.0)
-    tzinfo (2.0.0)
+    tzinfo (1.2.9)
       thread_safe (~> 0.1)
     unicode-display_width (1.4.0)