diff --git a/Gemfile.lock b/Gemfile.lock
index dab8bf1..0055037 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -50,8 +50,8 @@ 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)
     buftok (0.2.0)
     cairo (1.16.4)
       native-package-installer (>= 1.0.3)
@@ -129,7 +129,7 @@ GEM
       cairo-gobject (= 3.3.6)
       gobject-introspection (= 3.3.6)
     pkg-config (1.3.7)
-    public_suffix (3.1.1)
+    public_suffix (5.0.0)
     rake (12.3.2)
     rest-client (2.1.0.rc1)
       http-accept (>= 1.7.0, < 2.0)