diff --git a/backend/Gemfile.lock b/backend/Gemfile.lock
index 9c77271..c64cb26 100644
--- a/backend/Gemfile.lock
+++ b/backend/Gemfile.lock
@@ -56,8 +56,8 @@ GEM
       minitest (~> 5.1)
       tzinfo (~> 1.1)
       zeitwerk (~> 2.2)
-    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     bindex (0.8.1)
     bootsnap (1.4.5)
       msgpack (~> 1.0)
@@ -106,7 +106,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (4.0.3)
+    public_suffix (5.0.0)
     puma (4.3.1)
       nio4r (~> 2.0)
     rack (2.1.2)