diff --git a/Gemfile b/Gemfile
index 43fc74d..36aa4f0 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 6.0.2', '>= 6.0.2.1'
 # Use sqlite3 as the database for Active Record
 # gem 'sqlite3', '~> 1.4'
 # Use Puma as the app server
-gem 'puma', '~> 4.1'
+gem 'puma', '~> 4.3'
 # Use SCSS for stylesheets
 
 gem 'rubocop'
diff --git a/Gemfile.lock b/Gemfile.lock
index d888e04..95c2eed 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -77,6 +77,7 @@ GEM
     concurrent-ruby (1.1.6)
     crass (1.0.6)
     erubi (1.9.0)
+    ffi (1.12.2)
     ffi (1.12.2-x64-mingw32)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
@@ -97,16 +98,20 @@ GEM
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.14.0)
+    msgpack (1.3.3)
     msgpack (1.3.3-x64-mingw32)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
+    nokogiri (1.10.8)
+      mini_portile2 (~> 2.4.0)
     nokogiri (1.10.8-x64-mingw32)
       mini_portile2 (~> 2.4.0)
     parallel (1.19.1)
     parser (2.7.0.2)
       ast (~> 2.4.0)
+    pg (1.2.2)
     pg (1.2.2-x64-mingw32)
     public_suffix (4.0.3)
-    puma (4.3.1)
+    puma (4.3.12)
       nio4r (~> 2.0)
     rack (2.2.2)
     rack-proxy (0.6.5)
@@ -158,6 +163,8 @@ GEM
     rubyzip (2.2.0)
     sass-rails (6.0.0)
       sassc-rails (~> 2.1, >= 2.1.1)
+    sassc (2.2.1)
+      ffi (~> 1.9)
     sassc (2.2.1-x64-mingw32)
       ffi (~> 1.9)
     sassc-rails (2.1.2)
@@ -210,6 +217,7 @@ GEM
 
 PLATFORMS
   x64-mingw32
+  x86_64-linux
 
 DEPENDENCIES
   bcrypt (~> 3.1.7)
@@ -218,7 +226,7 @@ DEPENDENCIES
   capybara (>= 2.15)
   jbuilder (~> 2.7)
   pg
-  puma (~> 4.1)
+  puma (~> 4.3)
   rails (~> 6.0.2, >= 6.0.2.1)
   rails_12factor
   rubocop