diff --git a/Gemfile b/Gemfile
index d098f28..4fa7184 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,7 +10,7 @@ ruby '2.6.6'
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 6.0.2', '>= 6.0.2.1'
 # Use Puma as the app server
-gem 'puma', '~> 4.1'
+gem 'puma', '~> 4.3'
 # Use SCSS for stylesheets
 gem 'sass-rails', '>= 6'
 # Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
diff --git a/Gemfile.lock b/Gemfile.lock
index 9fd51ea..1309af1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -183,7 +183,6 @@ GEM
       rails (>= 5.0)
     jbuilder (2.11.2)
       activesupport (>= 5.0.0)
-    json (2.5.1)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
@@ -205,7 +204,7 @@ GEM
     msgpack (1.4.2)
     multi_json (1.15.0)
     nenv (0.3.0)
-    nio4r (2.5.7)
+    nio4r (2.5.8)
     nokogiri (1.11.2)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
@@ -223,7 +222,7 @@ GEM
       coderay (~> 1.1)
       method_source (~> 1.0)
     public_suffix (4.0.6)
-    puma (4.3.7)
+    puma (4.3.12)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
@@ -276,7 +275,6 @@ GEM
       railties (>= 5.0)
     ruby-vips (2.1.0)
       ffi (~> 1.12)
-    ruby2_keywords (0.0.4)
     ruby_dep (1.5.0)
     ruby_parser (3.15.1)
       sexp_processor (~> 4.9)
@@ -376,7 +374,7 @@ DEPENDENCIES
   pagy (~> 3.5)
   pg
   pretender
-  puma (~> 4.1)
+  puma (~> 4.3)
   rack-attack
   rack-livereload
   rails (~> 6.0.2, >= 6.0.2.1)