diff --git a/styleguide/Gemfile.lock b/styleguide/Gemfile.lock
index 4fa6c6e3..a1fbfc2e 100644
--- a/styleguide/Gemfile.lock
+++ b/styleguide/Gemfile.lock
@@ -36,8 +36,8 @@ GEM
       minitest (~> 5.1)
       tzinfo (~> 1.1)
       zeitwerk (~> 2.2, >= 2.2.2)
-    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     builder (3.2.4)
     colorator (1.1.0)
     concurrent-ruby (1.1.7)
@@ -112,7 +112,7 @@ GEM
     parallel (1.19.2)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (4.0.5)
+    public_suffix (5.0.0)
     rack (2.2.3)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)