diff --git a/Gemfile b/Gemfile
index 74f13ec..064a109 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,7 +7,7 @@ ruby '2.4.0'
 gem 'rails', '~> 5.2.3'
 gem "sprockets", "~> 3.7.2" 
 # Use Puma as the app server
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 5.6'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 # gem 'jbuilder', '~> 2.5'
 # Use Redis adapter to run Action Cable in production
diff --git a/Gemfile.lock b/Gemfile.lock
index 01b4bbd..e3bd593 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -95,7 +95,8 @@ GEM
       mini_portile2 (~> 2.4.0)
     pg (1.2.3)
     public_suffix (4.0.5)
-    puma (3.12.6)
+    puma (5.6.9)
+      nio4r (~> 2.0)
     rack (2.2.6.3)
     rack-cors (1.1.1)
       rack (>= 2.0.0)
@@ -196,7 +197,7 @@ DEPENDENCIES
   jwt
   listen (>= 3.0.5, < 3.2)
   pg (>= 0.20.0)
-  puma (~> 3.11)
+  puma (~> 5.6)
   rack-cors
   rails (~> 5.2.3)
   rspec-rails