diff --git a/Gemfile.lock b/Gemfile.lock
index c0ba9e0..e78a8b9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,7 +8,9 @@ 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 (1.11.3)
     ffi (1.11.3-x64-mingw32)
     forwardable-extended (2.6.0)
     http_parser.rb (0.6.0)
@@ -38,7 +40,8 @@ GEM
       jekyll (>= 3.3, < 5.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    kramdown (2.1.0)
+    kramdown (2.3.1)
+      rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
     liquid (4.0.3)
@@ -56,8 +59,11 @@ GEM
     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)
+      ffi (~> 1.9)
     sassc (2.2.1-x64-mingw32)
       ffi (~> 1.9)
     terminal-table (1.8.0)
@@ -71,6 +77,7 @@ GEM
     wdm (0.1.1)
 
 PLATFORMS
+  ruby
   x64-mingw32
 
 DEPENDENCIES