diff --git a/Gemfile b/Gemfile
index 8c4b72a..75e330d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,7 @@ gem 'rails', '~> 6.0.2', '>= 6.0.2.2'
 
 gem 'pg', '>= 0.18', '< 2.0'
 # Use Puma as the app server
-gem 'puma', '~> 4.1'
+gem 'puma', '~> 4.3'
 
 gem 'passenger', '5.0.28'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 6f7a367..4ce150b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -98,7 +98,7 @@ GEM
     mini_portile2 (2.4.0)
     minitest (5.14.0)
     msgpack (1.3.3)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
     passenger (5.0.28)
@@ -110,7 +110,7 @@ GEM
       method_source (~> 1.0)
     pry-rails (0.3.9)
       pry (>= 0.10.4)
-    puma (4.3.3)
+    puma (4.3.9)
       nio4r (~> 2.0)
     rack (2.2.2)
     rack-cors (1.1.1)
@@ -188,7 +188,7 @@ DEPENDENCIES
   passenger (= 5.0.28)
   pg (>= 0.18, < 2.0)
   pry-rails
-  puma (~> 4.1)
+  puma (~> 4.3)
   rack-cors
   rails (~> 6.0.2, >= 6.0.2.2)
   rails_12factor