diff --git a/Gemfile.lock b/Gemfile.lock
index 323fbf8..7d01c84 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,8 +6,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     asciidoctor (1.5.8)
     colorator (1.1.0)
     colorize (0.8.1)
@@ -72,7 +72,7 @@ GEM
     parallel (1.13.0)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (3.0.3)
+    public_suffix (5.0.0)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)
       ffi (~> 1.0)
@@ -89,7 +89,6 @@ GEM
       ethon (>= 0.9.0)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    wdm (0.1.1)
     yell (2.0.7)
 
 PLATFORMS
@@ -103,7 +102,6 @@ DEPENDENCIES
   jekyll-asciidoc (= 2.1.1)
   jekyll-sass-converter (= 1.5.2)
   jekyll-sitemap (= 1.2.0)
-  wdm (>= 0.1.0)
 
 BUNDLED WITH
    1.16.1