diff --git a/Gemfile b/Gemfile
index 1b15a51..e77c328 100644
--- a/Gemfile
+++ b/Gemfile
@@ -16,7 +16,7 @@ gem 'rails', '~> 6.0.2', '>= 6.0.2.1'
 
 # Use Puma as the app server
 
-gem 'puma', '~> 4.1'
+gem 'puma', '~> 4.3'
 
 # Use SCSS for stylesheets
 
diff --git a/Gemfile.lock b/Gemfile.lock
index bf609e5..6cb71f9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -101,8 +101,10 @@ GEM
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
     erubi (1.9.0)
+    eventmachine (1.2.7)
     eventmachine (1.2.7-x64-mingw32)
     execjs (2.7.0)
+    ffi (1.12.2)
     ffi (1.12.2-x64-mingw32)
     formatador (0.2.5)
     globalid (0.4.2)
@@ -145,10 +147,13 @@ 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)
     multi_json (1.14.1)
     nenv (0.3.0)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
+    nokogiri (1.10.9)
+      mini_portile2 (~> 2.4.0)
     nokogiri (1.10.9-x64-mingw32)
       mini_portile2 (~> 2.4.0)
     notiffany (0.1.3)
@@ -158,12 +163,13 @@ GEM
     parallel (1.19.1)
     parser (2.7.1.1)
       ast (~> 2.4.0)
+    pg (1.2.3)
     pg (1.2.3-x64-mingw32)
     pry (0.13.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
     public_suffix (4.0.4)
-    puma (4.3.3)
+    puma (4.3.12)
       nio4r (~> 2.0)
     rack (2.2.2)
     rack-proxy (0.6.5)
@@ -221,6 +227,8 @@ GEM
       unicode-display_width (>= 1.4.0, < 2.0)
     ruby-progressbar (1.10.1)
     rubyzip (2.3.0)
+    sassc (2.2.1)
+      ffi (~> 1.9)
     sassc (2.2.1-x64-mingw32)
       ffi (~> 1.9)
     sassc-rails (2.1.2)
@@ -257,7 +265,6 @@ GEM
     unicode-display_width (1.7.0)
     warden (1.2.8)
       rack (>= 2.0.6)
-    wdm (0.1.1)
     web-console (4.0.1)
       actionview (>= 6.0.0)
       activemodel (>= 6.0.0)
@@ -280,6 +287,7 @@ GEM
 
 PLATFORMS
   x64-mingw32
+  x86_64-linux
 
 DEPENDENCIES
   bcrypt (~> 3.1.7)
@@ -296,7 +304,7 @@ DEPENDENCIES
   guard-livereload (~> 2.5, >= 2.5.2)
   jbuilder (~> 2.7)
   pg
-  puma (~> 4.1)
+  puma (~> 4.3)
   rails (~> 6.0.2, >= 6.0.2.1)
   rails_12factor
   rubocop
@@ -306,7 +314,6 @@ DEPENDENCIES
   sqlite3
   turbolinks (~> 5)
   tzinfo-data
-  wdm (>= 0.1.0)
   web-console (>= 3.3.0)
   webdrivers
   webpacker (~> 4.0)