diff --git a/Gemfile.lock b/Gemfile.lock
index fafb409..f8b2e0d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     cryptoexchange (0.22.0)
       http (~> 3.0.0)
       lru_redux
@@ -19,7 +19,7 @@ GEM
     http_parser.rb (0.6.0)
     lru_redux (1.1.0)
     mustermann (1.0.2)
-    public_suffix (3.0.2)
+    public_suffix (5.0.0)
     rack (2.2.2)
     rack-protection (2.0.3)
       rack