diff --git a/Gemfile.lock b/Gemfile.lock
index a33b8df..ff7759f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (6.0.3.2)
+    activesupport (6.0.6.1)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
@@ -16,7 +16,7 @@ GEM
     colorator (1.1.0)
     commonmarker (0.17.13)
       ruby-enum (~> 0.5)
-    concurrent-ruby (1.1.9)
+    concurrent-ruby (1.2.0)
     dnsruby (1.61.9)
       simpleidn (~> 0.1)
     em-websocket (0.5.3)
@@ -88,11 +88,11 @@ GEM
       jekyll-theme-time-machine (= 0.1.1)
       jekyll-titles-from-headings (= 0.5.3)
       jemoji (= 0.11.1)
-      kramdown (= 2.3.1)
+      kramdown (= 1.17.0)
       liquid (= 4.0.3)
       mercenary (~> 0.3)
       minima (= 2.5.1)
-      nokogiri (>= 1.11.5, < 2.0)
+      nokogiri (>= 1.10.4, < 2.0)
       rouge (= 3.19.0)
       terminal-table (~> 1.4)
     github-pages-health-check (1.16.1)
@@ -114,7 +114,7 @@ GEM
       i18n (~> 0.7)
       jekyll-sass-converter (~> 1.0)
       jekyll-watch (~> 2.0)
-      kramdown (~> 2.3.1)
+      kramdown (~> 1.14)
       liquid (~> 4.0)
       mercenary (~> 0.3.3)
       pathutil (~> 0.9)
@@ -216,8 +216,7 @@ GEM
       jekyll (>= 3.8.5)
       jekyll-seo-tag (~> 2.0)
       rake (>= 12.3.1, < 13.1.0)
-    kramdown (2.3.1)
-      rexml
+    kramdown (1.17.0)
     liquid (4.0.3)
     listen (3.7.1)
       rb-fsevent (~> 0.10, >= 0.10.3)
@@ -228,7 +227,7 @@ GEM
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
-    minitest (5.14.1)
+    minitest (5.17.0)
     multipart-post (2.1.1)
     nokogiri (1.13.4)
       mini_portile2 (~> 2.8.0)
@@ -244,7 +243,6 @@ GEM
     rb-fsevent (0.11.1)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.5)
     rouge (3.19.0)
     ruby-enum (0.8.0)
       i18n
@@ -272,7 +270,7 @@ GEM
       unf_ext
     unf_ext (0.0.8)
     unicode-display_width (1.7.0)
-    zeitwerk (2.3.0)
+    zeitwerk (2.6.6)
 
 PLATFORMS
   ruby