diff --git a/backend/Gemfile b/backend/Gemfile
index 4c89747..0f5881e 100644
--- a/backend/Gemfile
+++ b/backend/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 6.0.2', '>= 6.0.2.1'
 # Use sqlite3 as the database for Active Record
 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/backend/Gemfile.lock b/backend/Gemfile.lock
index 9c77271..ae5845e 100644
--- a/backend/Gemfile.lock
+++ b/backend/Gemfile.lock
@@ -107,7 +107,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     public_suffix (4.0.3)
-    puma (4.3.1)
+    puma (4.3.5)
       nio4r (~> 2.0)
     rack (2.1.2)
     rack-cors (1.1.1)
@@ -213,7 +213,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   nokogiri (~> 1.6, >= 1.6.8)
   pry (~> 0.12.2)
-  puma (~> 4.1)
+  puma (~> 4.3)
   rack-cors
   rails (~> 6.0.2, >= 6.0.2.1)
   sass-rails (>= 6)