diff --git a/Gemfile b/Gemfile
index bf08c62..7992826 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 5.2.2'
 gem 'pg'
 
 # Use Puma as the app server
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 5.6'
 
 gem 'devise', ">= 4.6.0"
 gem 'simple_form'
diff --git a/Gemfile.lock b/Gemfile.lock
index 04689fc..9b61a9c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -137,7 +137,9 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.2)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
     mini_racer (0.2.4)
@@ -176,7 +178,8 @@ GEM
     pg (1.1.4)
     popper_js (1.14.5)
     public_suffix (3.0.3)
-    puma (3.12.0)
+    puma (5.6.2)
+      nio4r (~> 2.0)
     rack (2.0.6)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -302,7 +305,7 @@ DEPENDENCIES
   omniauth-github
   omniauth-twitter
   pg
-  puma (~> 3.11)
+  puma (~> 5.6)
   rails (~> 5.2.2)
   redcarpet
   sass-rails (~> 5.0)