diff --git a/Gemfile b/Gemfile
index 10aad18..3655152 100644
--- a/Gemfile
+++ b/Gemfile
@@ -17,7 +17,7 @@ gem 'jbuilder',     '2.9.1'
 gem 'jquery-rails', '4.3.5'
 gem 'paper_trail'
 gem 'pg', '1.1.4'
-gem 'puma', '4.0.0'
+gem 'puma', '4.3.12'
 gem 'rails', '5.2.3 '
 gem 'rails_admin', '~> 1.4.2'
 gem 'rails_admin_history_rollback'
diff --git a/Gemfile.lock b/Gemfile.lock
index 109b4ae..32f3a50 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -157,7 +157,7 @@ GEM
     mini_portile2 (2.4.0)
     minitest (5.11.3)
     nested_form (0.3.2)
-    nio4r (2.3.1)
+    nio4r (2.5.8)
     nokogiri (1.10.3)
       mini_portile2 (~> 2.4.0)
     orm_adapter (0.5.0)
@@ -170,7 +170,7 @@ GEM
     pg (1.1.4)
     popper_js (1.14.5)
     public_suffix (3.1.1)
-    puma (4.0.0)
+    puma (4.3.12)
       nio4r (~> 2.0)
     rack (2.0.7)
     rack-pjax (1.1.0)
@@ -327,7 +327,7 @@ DEPENDENCIES
   md_simple_editor
   paper_trail
   pg (= 1.1.4)
-  puma (= 4.0.0)
+  puma (= 4.3.12)
   rails (= 5.2.3)
   rails_admin (~> 1.4.2)
   rails_admin_history_rollback