diff --git a/Gemfile b/Gemfile
index f2283d5..e9ea7af 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 6.0.2', '>= 6.0.2.2'
 # Use mysql as the database for Active Record
 gem 'mysql2', '>= 0.4.4'
 # 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 653898b..469b955 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -129,7 +129,7 @@ GEM
     msgpack (1.3.3)
     multipart-post (2.1.1)
     mysql2 (0.5.3)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
     orm_adapter (0.5.0)
@@ -137,7 +137,7 @@ GEM
       coderay (~> 1.1)
       method_source (~> 1.0)
     public_suffix (4.0.3)
-    puma (4.3.3)
+    puma (4.3.12)
       nio4r (~> 2.0)
     rack (2.2.2)
     rack-cors (1.1.1)
@@ -220,7 +220,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   mysql2 (>= 0.4.4)
   pry
-  puma (~> 4.1)
+  puma (~> 4.3)
   rack-cors
   rails (~> 6.0.2, >= 6.0.2.2)
   simple_token_authentication (~> 1.0)