diff --git a/Gemfile.lock b/Gemfile.lock
index b5cb6e3..e7ccfb0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,7 +10,9 @@ 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 (1.13.1)
     ffi (1.13.1-x64-mingw32)
     forwardable-extended (2.6.0)
     http_parser.rb (0.6.0)
@@ -50,7 +52,7 @@ GEM
       jekyll (>= 3.8.5)
       jekyll-seo-tag (~> 2.0)
       rake (>= 12.3.1, < 13.1.0)
-    kramdown (2.3.0)
+    kramdown (2.3.1)
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
@@ -75,6 +77,8 @@ GEM
     ruby-enum (0.8.0)
       i18n
     safe_yaml (1.0.5)
+    sassc (2.4.0)
+      ffi (~> 1.9)
     sassc (2.4.0-x64-mingw32)
       ffi (~> 1.9)
     terminal-table (1.8.0)
@@ -88,6 +92,7 @@ GEM
     wdm (0.1.1)
 
 PLATFORMS
+  ruby
   x64-mingw32
 
 DEPENDENCIES