diff --git a/Gemfile b/Gemfile
index 61e9782..66f5276 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,7 @@ gem 'rails', '~> 6.0.0'
 gem 'pg'
 
 # Use Puma as the app server
-gem 'puma', '~> 3.12'
+gem 'puma', '~> 4.3'
 
 # Use Papertrail for change tracking
 gem 'paper_trail', '~>10.3'
diff --git a/Gemfile.lock b/Gemfile.lock
index 6c00eeb..ec9b015 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -115,7 +115,8 @@ GEM
     pry-byebug (3.9.0)
       byebug (~> 11.0)
       pry (~> 0.13.0)
-    puma (3.12.6)
+    puma (4.3.12)
+      nio4r (~> 2.0)
     rack (2.2.3)
     rack-contrib (2.2.0)
       rack (~> 2.0)
@@ -190,7 +191,7 @@ DEPENDENCIES
   pg
   pry
   pry-byebug
-  puma (~> 3.12)
+  puma (~> 4.3)
   rack-contrib
   rails (~> 6.0.0)
   spring