diff --git a/Gemfile.lock b/Gemfile.lock
index 599c085..d7cd619 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,8 +10,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.5.0)
-      public_suffix (~> 2.0, >= 2.0.2)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     asciidoctor (1.5.5)
     ast (2.3.0)
     bcrypt (3.1.11)
@@ -38,7 +38,7 @@ GEM
     parser (2.3.1.4)
       ast (~> 2.2)
     powerpack (0.1.1)
-    public_suffix (2.0.4)
+    public_suffix (2.0.5)
     puma (3.6.0)
     rack (1.6.4)
     rack-protection (1.5.3)