diff --git a/sharsukhchuluun/toy_app/Gemfile b/sharsukhchuluun/toy_app/Gemfile
index fa56acb..7a89c18 100644
--- a/sharsukhchuluun/toy_app/Gemfile
+++ b/sharsukhchuluun/toy_app/Gemfile
@@ -6,7 +6,7 @@ gem 'faker',          '1.7.3'
 gem 'will_paginate',           '3.1.5'
 gem 'bootstrap-will_paginate', '1.0.0'
 gem 'bootstrap-sass', '3.4.1'
-gem 'puma',         '4.3.9'
+gem 'puma',         '5.6.2'
 gem 'sass-rails',   '5.0.6'
 gem 'uglifier',     '3.2.0'
 gem 'coffee-rails', '4.2.2'
diff --git a/sharsukhchuluun/toy_app/Gemfile.lock b/sharsukhchuluun/toy_app/Gemfile.lock
index 021032a..d66a3a0 100644
--- a/sharsukhchuluun/toy_app/Gemfile.lock
+++ b/sharsukhchuluun/toy_app/Gemfile.lock
@@ -112,7 +112,7 @@ GEM
       ruby-progressbar
     multi_json (1.12.2)
     nenv (0.3.0)
-    nio4r (2.1.0)
+    nio4r (2.5.8)
     nokogiri (1.12.5)
       mini_portile2 (~> 2.6.1)
       racc (~> 1.4)
@@ -128,7 +128,7 @@ GEM
       yard (~> 0.9)
     pry-rails (0.3.6)
       pry (>= 0.10.4)
-    puma (4.3.9)
+    puma (5.6.2)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
@@ -233,7 +233,7 @@ DEPENDENCIES
   pg (= 0.18.4)
   pry-doc
   pry-rails
-  puma (= 4.3.9)
+  puma (= 5.6.2)
   rails (= 5.0.3)
   rails-controller-testing (= 1.0.2)
   sass-rails (= 5.0.6)