diff --git a/Gemfile b/Gemfile
index b965f29..519212d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 6.0.2', '>= 6.0.2.1'
 # 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'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 # gem 'jbuilder', '~> 2.7'
 # Use Redis adapter to run Action Cable in production
diff --git a/Gemfile.lock b/Gemfile.lock
index 1868ecd..1ad72e7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -115,7 +115,7 @@ GEM
     mini_portile2 (2.4.0)
     minitest (5.14.0)
     msgpack (1.3.1)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.7)
       mini_portile2 (~> 2.4.0)
     orm_adapter (0.5.0)
@@ -126,7 +126,7 @@ GEM
       mime-types
       mimemagic (~> 0.3.0)
     pg (1.2.2)
-    puma (4.3.1)
+    puma (4.3.11)
       nio4r (~> 2.0)
     rack (2.1.2)
     rack-cors (1.1.1)
@@ -259,7 +259,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   paperclip
   pg (>= 0.18, < 2.0)
-  puma (~> 4.1)
+  puma (~> 4.3)
   rack-cors
   rails (~> 6.0.2, >= 6.0.2.1)
   redis (~> 4.0)