diff --git a/Gemfile b/Gemfile
index ca6aa4fb..b38febfc 100644
--- a/Gemfile
+++ b/Gemfile
@@ -36,7 +36,7 @@ gem 'rails', '~> 6.0.2', '>= 6.0.2.1'
 # gem 'sqlite3', '~> 1.4'
 
 # 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 dec99702..200cd36a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -241,14 +241,14 @@ GEM
     multipart-post (2.1.1)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
     os (1.1.0)
     pg (1.2.3)
     popper_js (1.16.0)
     public_suffix (4.0.4)
-    puma (4.3.3)
+    puma (4.3.12)
       nio4r (~> 2.0)
     rack (2.2.2)
     rack-protection (2.0.8.1)
@@ -406,7 +406,7 @@ DEPENDENCIES
   kaminari
   listen (>= 3.0.5, < 3.2)
   pg (~> 1.2)
-  puma (~> 4.1)
+  puma (~> 4.3)
   rails (~> 6.0.2, >= 6.0.2.1)
   rails_12factor
   redis