diff --git a/Gemfile.lock b/Gemfile.lock
index c29a867..bcc655e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -18,7 +18,8 @@ GEM
     execjs (2.7.0)
     faraday (0.13.1)
       multipart-post (>= 1.2, < 3)
-    ffi (1.9.18-x64-mingw32)
+    ffi (1.15.5)
+    ffi (1.15.5-x64-mingw32)
     forwardable-extended (2.6.0)
     gemoji (3.0.0)
     github-pages (163)
@@ -179,6 +180,8 @@ GEM
     minitest (5.10.3)
     multipart-post (2.0.0)
     net-dns (0.8.0)
+    nokogiri (1.8.1)
+      mini_portile2 (~> 2.3.0)
     nokogiri (1.8.1-x64-mingw32)
       mini_portile2 (~> 2.3.0)
     octokit (4.7.0)
@@ -209,9 +212,9 @@ GEM
     tzinfo-data (1.2017.2)
       tzinfo (>= 1.0.0)
     unicode-display_width (1.3.0)
-    wdm (0.1.1)
 
 PLATFORMS
+  ruby
   x64-mingw32
 
 DEPENDENCIES
@@ -220,7 +223,6 @@ DEPENDENCIES
   jekyll-feed (~> 0.6)
   minima (~> 2.0)
   tzinfo-data
-  wdm (>= 0.1.0)
 
 BUNDLED WITH
    1.15.4