diff --git a/Gemfile b/Gemfile
index ec40c9c..9be2254 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 
 gem 'rails', '~> 6.0.0'
-gem 'puma', '~> 4.0'
+gem 'puma', '~> 4.3'
 gem 'sassc-rails'
 gem 'uglifier', '>= 1.3.0'
 gem 'pg'
diff --git a/Gemfile.lock b/Gemfile.lock
index 04e7e2d..e9eccf6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -119,12 +119,14 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.2)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.13.0)
     multi_json (1.14.1)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.5)
       mini_portile2 (~> 2.4.0)
     pg (1.1.4)
@@ -136,7 +138,7 @@ GEM
       pry (~> 0.10)
     pry-rails (0.3.9)
       pry (>= 0.10.4)
-    puma (4.3.0)
+    puma (4.3.11)
       nio4r (~> 2.0)
     pygments.rb (1.2.1)
       multi_json (>= 1.0.0)
@@ -243,7 +245,7 @@ DEPENDENCIES
   pry
   pry-byebug
   pry-rails
-  puma (~> 4.0)
+  puma (~> 4.3)
   pygments.rb
   rails (~> 6.0.0)
   ruby-adobe-io (= 0.4.0)!