diff --git a/Gemfile b/Gemfile
index a37818d..58fc757 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,7 @@ gem 'pg', '~>1.2.2'
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 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'
 gem 'sassc', '~> 2.2.1'
diff --git a/Gemfile.lock b/Gemfile.lock
index 95e7dd3..b5201e9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -147,14 +147,16 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.2)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_magick (4.10.1)
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.14.0)
     msgpack (1.3.1)
     multipart-post (2.1.1)
-    nio4r (2.5.2)
+    nio4r (2.5.7)
     nokogiri (1.10.8)
       mini_portile2 (~> 2.4.0)
     octicons (9.4.0)
@@ -175,7 +177,7 @@ GEM
     pg (1.2.2)
     popper_js (1.16.0)
     public_suffix (4.0.1)
-    puma (4.3.3)
+    puma (4.3.8)
       nio4r (~> 2.0)
     rack (2.1.1)
     rack-proxy (0.6.5)
@@ -323,7 +325,7 @@ DEPENDENCIES
   octokit (~> 4.0)
   passenger (= 5.3.7)
   pg (~> 1.2.2)
-  puma (~> 4.1)
+  puma (~> 4.3)
   rack (>= 2.0.8)
   rails (~> 6.0.2.1)
   rails-i18n (~> 6.0.0)