diff --git a/Gemfile.lock b/Gemfile.lock
index b4263d4..66fc01d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -231,7 +231,6 @@ GEM
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
     unicode-display_width (1.3.0)
-    wdm (0.1.1)
 
 PLATFORMS
   ruby
@@ -239,7 +238,6 @@ PLATFORMS
 
 DEPENDENCIES
   github-pages
-  wdm (>= 0.1.0)
 
 BUNDLED WITH
    1.16.1