diff --git a/Gemfile b/Gemfile
index 03041cf..c3b9b05 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 6.0.3', '>= 6.0.3.4'
 # Use postgresql as the database for Active Record
 gem 'pg', '>= 0.18', '< 2.0'
 # Use Puma as the app server
-gem 'puma', '~> 4.1'
+gem 'puma', '~> 4.3'
 # Use SCSS for stylesheets
 gem 'sass-rails', '>= 6'
 gem 'bootstrap', '~> 4.3.1'
diff --git a/Gemfile.lock b/Gemfile.lock
index ac56c8d..8f42988 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -122,7 +122,7 @@ GEM
     mini_portile2 (2.5.0)
     minitest (5.14.4)
     msgpack (1.4.2)
-    nio4r (2.5.7)
+    nio4r (2.5.8)
     nokogiri (1.11.2)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
@@ -134,7 +134,7 @@ GEM
     pg (1.2.3)
     popper_js (1.16.0)
     public_suffix (4.0.6)
-    puma (4.3.7)
+    puma (4.3.12)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
@@ -249,7 +249,7 @@ DEPENDENCIES
   listen (~> 3.2)
   mimemagic!
   pg (>= 0.18, < 2.0)
-  puma (~> 4.1)
+  puma (~> 4.3)
   rails (~> 6.0.3, >= 6.0.3.4)
   sass-rails (>= 6)
   selenium-webdriver