diff --git a/Gemfile b/Gemfile
index 65613269180000e5f1a4e7eddb1c67b5aa4fd4da..f26f8f0f794e7b1f072bfcf4142bfb278abadf01 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 ruby '2.6.3'
 
 gem 'rails', '~> 6.0.2', '>= 6.0.2.1'
-gem 'puma', '~> 4.1'
+gem 'puma', '~> 4.3'
 gem 'sass-rails', '>= 6'
 gem 'webpacker', '~> 4.0'
 gem 'turbolinks', '~> 5'
diff --git a/Gemfile.lock b/Gemfile.lock
index a200e0bbaa8bd52c9db3398a7743d7f9a35d022a..fb7c5a96b425aa292988c2a20117c5343f98ecd5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -118,12 +118,12 @@ GEM
     minitest (5.14.0)
     msgpack (1.3.3)
     mysql2 (0.5.3)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.11.2)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
     public_suffix (4.0.3)
-    puma (4.3.3)
+    puma (4.3.12)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.2)
@@ -234,7 +234,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   memory_profiler
   mysql2 (>= 0.4.4)
-  puma (~> 4.1)
+  puma (~> 4.3)
   rack-mini-profiler
   rails (~> 6.0.2, >= 6.0.2.1)
   sass-rails (>= 6)