diff --git a/Gemfile.lock b/Gemfile.lock
index 7f41c1e..282b3de 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     colorator (1.1.0)
     concurrent-ruby (1.0.5)
     em-websocket (0.5.1)
@@ -50,7 +50,7 @@ GEM
       jekyll-seo-tag (~> 2.1)
     pathutil (0.16.1)
       forwardable-extended (~> 2.6)
-    public_suffix (3.0.2)
+    public_suffix (4.0.6)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
@@ -67,7 +67,6 @@ GEM
       thread_safe (~> 0.1)
     tzinfo-data (1.2018.3)
       tzinfo (>= 1.0.0)
-    wdm (0.1.1)
 
 PLATFORMS
   ruby
@@ -78,7 +77,6 @@ DEPENDENCIES
   jekyll-feed (~> 0.6)
   minima (~> 2.0)
   tzinfo-data
-  wdm (~> 0.1.0)
 
 BUNDLED WITH
    2.1.4