diff --git a/Gemfile.lock b/Gemfile.lock
index 799ad41b..3af326a3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,7 +6,8 @@ GEM
     colorator (1.1.0)
     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)
     haml (5.0.2)
@@ -62,9 +63,9 @@ GEM
       thread_safe (~> 0.1)
     tzinfo-data (1.2017.2)
       tzinfo (>= 1.0.0)
-    wdm (0.1.1)
 
 PLATFORMS
+  ruby
   x64-mingw32
 
 DEPENDENCIES
@@ -73,7 +74,6 @@ DEPENDENCIES
   jekyll-haml
   octokit (~> 4.7)
   tzinfo-data
-  wdm (>= 0.1.0)
 
 BUNDLED WITH
    1.15.3