diff --git a/Gemfile b/Gemfile
index b5d9dc1..3288b64 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,7 +10,7 @@ gem 'rails', '~> 6.0.3', '>= 6.0.3.2'
 gem 'sqlite3', '~> 1.4'
 # Use Puma as the app server
 gem 'bootstrap', '~> 4.0'
-gem 'puma', '~> 4.1'
+gem 'puma', '~> 4.3'
 # Use SCSS for stylesheets
 gem 'sass-rails', '>= 6'
 # Transpile app-like JavaScript.
diff --git a/Gemfile.lock b/Gemfile.lock
index e7c41ce..97db340 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -135,7 +135,7 @@ GEM
     minitest (5.14.1)
     msgpack (1.3.3)
     nenv (0.3.0)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
     notiffany (0.1.3)
@@ -149,7 +149,7 @@ GEM
       coderay (~> 1.1)
       method_source (~> 1.0)
     public_suffix (4.0.5)
-    puma (4.3.5)
+    puma (4.3.12)
       nio4r (~> 2.0)
     rack (2.2.3)
     rack-proxy (0.6.5)
@@ -292,7 +292,7 @@ DEPENDENCIES
   hirb
   jbuilder (~> 2.7)
   listen (~> 3.2)
-  puma (~> 4.1)
+  puma (~> 4.3)
   rails (~> 6.0.3, >= 6.0.3.2)
   rspec-rails (~> 4.0, >= 4.0.1)
   rubocop (~> 0.81.0)