diff --git a/Gemfile.lock b/Gemfile.lock
index e2d30031..b9b9bafa 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,8 +11,8 @@ 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 (2.0.10)
     coderay (1.1.2)
     colorator (1.1.0)
@@ -99,7 +99,7 @@ GEM
       sawyer (~> 0.8.0, >= 0.5.3)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (3.1.1)
+    public_suffix (5.0.0)
     rack (2.0.8)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)