diff --git a/sharsukhchuluun/toy_app/environment/hello_app/Gemfile b/sharsukhchuluun/toy_app/environment/hello_app/Gemfile
index a1c369c..d248180 100644
--- a/sharsukhchuluun/toy_app/environment/hello_app/Gemfile
+++ b/sharsukhchuluun/toy_app/environment/hello_app/Gemfile
@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 
 gem 'rails',        '5.1.6'
-gem 'puma',         '4.3.9'
+gem 'puma',         '4.3.11'
 gem 'sass-rails',   '5.0.6'
 gem 'uglifier',     '3.2.0'
 gem 'coffee-rails', '4.2.2'
diff --git a/sharsukhchuluun/toy_app/environment/hello_app/Gemfile.lock b/sharsukhchuluun/toy_app/environment/hello_app/Gemfile.lock
index 9b40025..4c41eed 100644
--- a/sharsukhchuluun/toy_app/environment/hello_app/Gemfile.lock
+++ b/sharsukhchuluun/toy_app/environment/hello_app/Gemfile.lock
@@ -83,7 +83,7 @@ GEM
     nokogiri (1.12.5)
       mini_portile2 (~> 2.6.1)
       racc (~> 1.4)
-    puma (4.3.9)
+    puma (4.3.11)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
@@ -169,7 +169,7 @@ DEPENDENCIES
   jbuilder (= 2.6.4)
   jquery-rails (= 4.3.1)
   listen (= 3.1.5)
-  puma (= 4.3.9)
+  puma (= 4.3.11)
   rails (= 5.1.6)
   sass-rails (= 5.0.6)
   spring (= 2.0.2)