diff --git a/Gemfile.lock b/Gemfile.lock
index 0138977..42994b9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,8 +11,8 @@ GEM
       minitest (>= 5.1)
       mutex_m
       tzinfo (~> 2.0)
-    addressable (2.8.1)
-      public_suffix (>= 2.0.2, < 6.0)
+    addressable (2.9.0)
+      public_suffix (>= 2.0.2, < 8.0)
     ast (2.4.2)
     base64 (0.2.0)
     bibtex-ruby (6.0.0)
@@ -124,7 +124,7 @@ GEM
       forwardable-extended (~> 2.6)
     pkg-config (1.4.9)
     posix-spawn (0.3.15)
-    public_suffix (5.0.0)
+    public_suffix (7.0.5)
     racc (1.8.1)
     rainbow (3.1.1)
     rake (13.0.6)