diff --git a/Gemfile b/Gemfile
index d15abda..9cbd7a2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -14,7 +14,7 @@ gem 'pg', '~> 0.20'
 #For multi-field searching
 gem 'pg_search'
 # Use Puma as the app server
-gem 'puma', '~> 3.7'
+gem 'puma', '~> 4.3'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5.0'
 # Use Uglifier as compressor for JavaScript assets
diff --git a/Gemfile.lock b/Gemfile.lock
index ee08d1d..3a9e75c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -144,7 +144,8 @@ GEM
       activesupport (>= 4.2)
       arel (>= 6)
     public_suffix (3.0.1)
-    puma (3.11.2)
+    puma (4.3.12)
+      nio4r (~> 2.0)
     rack (2.0.3)
     rack-test (0.8.2)
       rack (>= 1.0, < 3)
@@ -261,7 +262,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   pg (~> 0.20)
   pg_search
-  puma (~> 3.7)
+  puma (~> 4.3)
   rails (~> 5.1.4)
   roo
   rspec-rails