diff --git a/Gemfile.lock b/Gemfile.lock
index a13ad26..ed47042 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,8 +6,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     backports (3.21.0)
     builder (3.2.4)
     coffee-script (2.4.1)
@@ -92,7 +92,7 @@ GEM
     padrino-support (0.13.3.4)
       activesupport (>= 3.1)
     parallel (1.20.1)
-    public_suffix (4.0.6)
+    public_suffix (5.0.0)
     racc (1.5.2)
     rack (2.2.3)
     rb-fsevent (0.11.0)