diff --git a/Gemfile.lock b/Gemfile.lock
index b3c5ae5..1ab215d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -126,13 +126,12 @@ GEM
       faraday (~> 0.8, < 0.10)
     terminal-table (1.7.2)
       unicode-display_width (~> 1.1.1)
-    thread_safe (0.3.5)
+    thread_safe (0.3.6)
     typhoeus (0.8.0)
       ethon (>= 0.8.0)
-    tzinfo (1.2.2)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     unicode-display_width (1.1.1)
-    wdm (0.1.1)
 
 PLATFORMS
   ruby
@@ -141,7 +140,6 @@ PLATFORMS
 DEPENDENCIES
   github-pages
   jekyll-feed
-  wdm (~> 0.1.0)
 
 BUNDLED WITH
    1.12.5