diff --git a/Gemfile b/Gemfile
index 224b99f..ea6e5ac 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 6.0.1'
 # 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 'sass-rails', '>= 6'
 # Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
diff --git a/Gemfile.lock b/Gemfile.lock
index 8f4a732..ced9e0d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -75,6 +75,7 @@ GEM
     concurrent-ruby (1.1.5)
     crass (1.0.5)
     erubi (1.9.0)
+    ffi (1.11.3)
     ffi (1.11.3-x64-mingw32)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
@@ -94,12 +95,15 @@ GEM
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.13.0)
+    msgpack (1.3.1)
     msgpack (1.3.1-x64-mingw32)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
+    nokogiri (1.10.5)
+      mini_portile2 (~> 2.4.0)
     nokogiri (1.10.5-x64-mingw32)
       mini_portile2 (~> 2.4.0)
     public_suffix (4.0.1)
-    puma (4.3.0)
+    puma (4.3.11)
       nio4r (~> 2.0)
     rack (2.0.7)
     rack-proxy (0.6.5)
@@ -137,6 +141,8 @@ GEM
     rubyzip (2.0.0)
     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)
@@ -188,13 +194,14 @@ GEM
 
 PLATFORMS
   x64-mingw32
+  x86_64-linux
 
 DEPENDENCIES
   bootsnap (>= 1.4.2)
   byebug
   capybara (>= 2.15)
   jbuilder (~> 2.7)
-  puma (~> 4.1)
+  puma (~> 4.3)
   rails (~> 6.0.1)
   sass-rails (>= 6)
   selenium-webdriver