diff --git a/Gemfile b/Gemfile
old mode 100755
new mode 100644
index 092c066..ac80e8f
--- a/Gemfile
+++ b/Gemfile
@@ -7,7 +7,7 @@ ruby '2.6.2'
 gem 'rails', '~> 5.2.2', '>= 5.2.2.1'
 # Use sqlite3 as the database for Active Record
 # Use Puma as the app server
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 4.3'
 # Use SCSS for stylesheets
 gem "bootstrap-sass", ">= 3.4.1"
 gem 'jquery-rails'
diff --git a/Gemfile.lock b/Gemfile.lock
old mode 100755
new mode 100644
index 8870aaf..a835de4
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -109,7 +109,9 @@ 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)
     minitest (5.11.3)
@@ -119,7 +121,8 @@ GEM
       mini_portile2 (~> 2.4.0)
     pg (1.1.4)
     public_suffix (3.0.3)
-    puma (3.12.1)
+    puma (4.3.12)
+      nio4r (~> 2.0)
     rack (2.0.7)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -224,7 +227,7 @@ DEPENDENCIES
   jquery-rails
   listen (>= 3.0.5, < 3.2)
   pg
-  puma (~> 3.11)
+  puma (~> 4.3)
   rails (~> 5.2.2, >= 5.2.2.1)
   sass-rails (~> 5.0)
   selenium-webdriver