diff --git a/Gemfile b/Gemfile
index 9e27be2..bfc4c9b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 5.2.1'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3'
 # Use Puma as the app server
-gem 'puma', '~> 4.3.11'
+gem 'puma', '~> 4.3.12'
 # 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 652534d..79238ea 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -49,6 +49,7 @@ GEM
     archive-zip (0.11.0)
       io-like (~> 0.3.0)
     arel (9.0.0)
+    bcrypt_pbkdf (1.1.0)
     bindex (0.5.0)
     bootsnap (1.3.2)
       msgpack (~> 1.0)
@@ -65,10 +66,13 @@ GEM
     capistrano-rails (1.4.0)
       capistrano (~> 3.1)
       capistrano-bundler (~> 1.1)
-    capistrano3-puma (3.1.1)
+    capistrano-rbenv (2.2.0)
+      capistrano (~> 3.1)
+      sshkit (~> 1.3)
+    capistrano3-puma (5.2.0)
       capistrano (~> 3.7)
       capistrano-bundler
-      puma (~> 3.4)
+      puma (>= 4.0, < 6.0)
     capybara (3.9.0)
       addressable
       mini_mime (>= 0.1.3)
@@ -90,6 +94,7 @@ GEM
     coffee-script-source (1.12.2)
     concurrent-ruby (1.0.5)
     crass (1.0.4)
+    ed25519 (1.3.0)
     erubi (1.7.1)
     execjs (2.7.0)
     ffi (1.9.25)
@@ -113,7 +118,9 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.0)
-    mimemagic (0.3.2)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.1)
     mini_portile2 (2.3.0)
     minitest (5.11.3)
@@ -127,7 +134,8 @@ GEM
     nokogiri (1.8.4)
       mini_portile2 (~> 2.3.0)
     public_suffix (3.0.3)
-    puma (3.12.0)
+    puma (4.3.12)
+      nio4r (~> 2.0)
     rack (2.0.5)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -161,9 +169,6 @@ GEM
       ffi (>= 0.5.0, < 2)
     ruby_dep (1.5.0)
     rubyzip (1.2.2)
-    rvm1-capistrano3 (1.4.0)
-      capistrano (~> 3.0)
-      sshkit (>= 1.2)
     sass (3.6.0)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
@@ -219,21 +224,23 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  bcrypt_pbkdf (>= 1.0, < 2.0)
   bootsnap (>= 1.1.0)
   byebug
   capistrano (~> 3.10)
   capistrano-bundler (>= 1.1.0)
   capistrano-rails (~> 1.4)
-  capistrano3-puma
+  capistrano-rbenv (~> 2.2)
+  capistrano3-puma (= 5.2.0)
   capybara (>= 2.15)
   chromedriver-helper
   coffee-rails (~> 4.2)
+  ed25519 (>= 1.2, < 2.0)
   jbuilder (~> 2.5)
   listen (>= 3.0.5, < 3.2)
   mysql2
-  puma (~> 3.11)
+  puma (~> 4.3.12)
   rails (~> 5.2.1)
-  rvm1-capistrano3
   sass-rails (~> 5.0)
   selenium-webdriver
   spring