diff --git a/Gemfile.lock b/Gemfile.lock
index c51ceaf..0bf8992 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -14,7 +14,9 @@ GEM
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
+    eventmachine (1.2.7)
     eventmachine (1.2.7-x64-mingw32)
+    ffi (1.12.2)
     ffi (1.12.2-x64-mingw32)
     forwardable-extended (2.6.0)
     gemoji (3.0.1)
@@ -51,7 +53,8 @@ GEM
       gemoji (~> 3.0)
       html-pipeline (~> 2.2)
       jekyll (>= 3.0, < 5.0)
-    kramdown (2.1.0)
+    kramdown (2.3.1)
+      rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
     liquid (4.0.3)
@@ -61,6 +64,8 @@ GEM
     mercenary (0.3.6)
     mini_portile2 (2.4.0)
     minitest (5.11.3)
+    nokogiri (1.10.8)
+      mini_portile2 (~> 2.4.0)
     nokogiri (1.10.8-x64-mingw32)
       mini_portile2 (~> 2.4.0)
     pathutil (0.16.2)
@@ -70,8 +75,11 @@ GEM
     rb-fsevent (0.10.3)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
+    rexml (3.2.4)
     rouge (3.16.0)
     safe_yaml (1.0.5)
+    sassc (2.2.1)
+      ffi (~> 1.9)
     sassc (2.2.1-x64-mingw32)
       ffi (~> 1.9)
     terminal-table (1.8.0)
@@ -84,6 +92,7 @@ GEM
     zeitwerk (2.2.2)
 
 PLATFORMS
+  ruby
   x64-mingw32
 
 DEPENDENCIES