diff --git a/Gemfile.lock b/Gemfile.lock
index 236b063..b842215 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,7 +4,7 @@ GEM
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
     colorator (1.1.0)
-    concurrent-ruby (1.1.5)
+    concurrent-ruby (1.1.10)
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
@@ -12,13 +12,13 @@ GEM
     eventmachine (1.2.7-x64-mingw32)
     faraday (1.0.0)
       multipart-post (>= 1.2, < 3)
-    ffi (1.11.3)
-    ffi (1.11.3-x64-mingw32)
+    ffi (1.15.5)
+    ffi (1.15.5-x64-mingw32)
     forwardable-extended (2.6.0)
     http_parser.rb (0.6.0)
-    i18n (1.8.0)
+    i18n (1.12.0)
       concurrent-ruby (~> 1.0)
-    jekyll (4.0.0)
+    jekyll (4.0.1)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
@@ -36,10 +36,10 @@ GEM
     jekyll-gist (1.5.0)
       octokit (~> 4.2)
     jekyll-paginate (1.1.0)
-    jekyll-sass-converter (2.0.1)
+    jekyll-sass-converter (2.2.0)
       sassc (> 2.0.1, < 3.0)
-    jekyll-seo-tag (2.6.1)
-      jekyll (>= 3.3, < 5.0)
+    jekyll-seo-tag (2.8.0)
+      jekyll (>= 3.8, < 5.0)
     jekyll-target-blank (2.0.0)
       jekyll (>= 3.0, < 5.0)
       nokogiri (~> 1.10)
@@ -50,31 +50,31 @@ GEM
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
     liquid (4.0.3)
-    listen (3.2.1)
+    listen (3.7.1)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.8.0)
     multipart-post (2.1.1)
-    nokogiri (1.10.8)
-      mini_portile2 (~> 2.4.0)
-    nokogiri (1.10.8-x64-mingw32)
-      mini_portile2 (~> 2.4.0)
-    octokit (4.15.0)
+    nokogiri (1.13.9)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
+    octokit (4.22.0)
       faraday (>= 0.9)
       sawyer (~> 0.8.0, >= 0.5.3)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (4.0.3)
+    racc (1.6.0)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rexml (3.2.4)
     rouge (3.14.0)
     safe_yaml (1.0.5)
-    sassc (2.2.1)
+    sassc (2.4.0)
       ffi (~> 1.9)
-    sassc (2.2.1-x64-mingw32)
+    sassc (2.4.0-x64-mingw32)
       ffi (~> 1.9)
     sawyer (0.8.2)
       addressable (>= 2.3.5)