diff --git a/Gemfile.lock b/Gemfile.lock
index 1b74841..f4a28c9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -63,7 +63,8 @@ GEM
       byebug (~> 9.0)
       pry (~> 0.10)
     public_suffix (2.0.5)
-    puma (3.12.6)
+    puma (4.3.9)
+      nio4r (~> 2.0)
     rack (1.6.13)
     rack-protection (1.5.5)
       rack