diff --git a/Gemfile b/Gemfile
index 35e8daa..61dc9f1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,7 +3,7 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
 gem 'rails', '~> 5.2'
 gem 'pg', '~> 1.2'
-gem 'puma', '~> 5.2'
+gem 'puma', '~> 5.6'
 gem 'sass-rails', '~> 5.1'
 gem 'uglifier', '~> 4.2'
 gem 'coffee-rails', '~> 4.2'
diff --git a/Gemfile.lock b/Gemfile.lock
index b6227d0..ac0a8d4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,6 +1,15 @@
 GEM
-  remote: https://rubygems.org/
   remote: https://rails-assets.org/
+  specs:
+    rails-assets-bootbox (5.2.0)
+      rails-assets-bootstrap (>= 3.3.7)
+    rails-assets-bootstrap (3.3.7)
+      rails-assets-jquery (>= 1.9.1, < 4)
+    rails-assets-jquery (3.4.1)
+    rails-assets-notifyjs (0.4.2)
+
+GEM
+  remote: https://rubygems.org/
   specs:
     actioncable (5.2.4.5)
       actionpack (= 5.2.4.5)
@@ -134,14 +143,14 @@ GEM
       minitest (>= 5.0)
       ruby-progressbar
     msgpack (1.4.2)
-    nio4r (2.5.5)
+    nio4r (2.5.8)
     nokogiri (1.11.1)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
     orm_adapter (0.5.0)
     pg (1.2.3)
     public_suffix (4.0.6)
-    puma (5.2.1)
+    puma (5.6.2)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
@@ -162,12 +171,6 @@ GEM
       bundler (>= 1.3.0)
       railties (= 5.2.4.5)
       sprockets-rails (>= 2.0.0)
-    rails-assets-bootbox (5.2.0)
-      rails-assets-bootstrap (>= 3.3.7)
-    rails-assets-bootstrap (3.3.7)
-      rails-assets-jquery (>= 1.9.1, < 4)
-    rails-assets-jquery (3.4.1)
-    rails-assets-notifyjs (0.4.2)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
@@ -271,7 +274,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   minitest-reporters (~> 1.4)
   pg (~> 1.2)
-  puma (~> 5.2)
+  puma (~> 5.6)
   rack-attack (~> 6.5)
   rails (~> 5.2)
   rails-assets-bootbox!