diff --git a/Gemfile.lock b/Gemfile.lock
index 5f7829f..3ad2039 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     colorator (1.1.0)
     concurrent-ruby (1.1.7)
     em-websocket (0.5.2)
@@ -46,13 +46,17 @@ GEM
     plainwhite (0.13)
       jekyll (>= 3.7.3)
       jekyll-seo-tag (>= 2.1.0)
-    public_suffix (4.0.6)
+    public_suffix (5.0.0)
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rouge (3.26.0)
     safe_yaml (1.0.5)
     sass (3.7.4)
+      sass-listen (~> 4.0.0)
+    sass-listen (4.0.0)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
     thread_safe (0.3.6)
     tzinfo (1.2.8)
       thread_safe (~> 0.1)