diff --git a/Gemfile b/Gemfile
index dba03ad..ca38337 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,7 @@ gem 'rails', '> 6.0.1'
 # Use postgresql as the database for Active Record
 gem 'pg', '>= 0.18', '< 2.0'
 # Use Puma as the app server
-gem 'puma', '~> 4.1'
+gem 'puma', '~> 4.3'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 # gem 'jbuilder', '~> 2.7'
 # Use Redis adapter to run Action Cable in production
diff --git a/Gemfile.lock b/Gemfile.lock
index 6562718..42a8fd5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -87,7 +87,9 @@ 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)
@@ -100,7 +102,7 @@ GEM
       minitest (>= 5.0)
       ruby-progressbar
     msgpack (1.3.1)
-    nio4r (2.5.2)
+    nio4r (2.5.7)
     nokogiri (1.10.7)
       mini_portile2 (~> 2.4.0)
     pg (1.2.1)
@@ -109,7 +111,7 @@ GEM
       method_source (~> 0.9.0)
     pry-rails (0.3.9)
       pry (>= 0.10.4)
-    puma (4.3.1)
+    puma (4.3.8)
       nio4r (~> 2.0)
     rack (2.0.8)
     rack-test (1.1.0)
@@ -181,7 +183,7 @@ DEPENDENCIES
   minitest-reporters
   pg (>= 0.18, < 2.0)
   pry-rails
-  puma (~> 4.1)
+  puma (~> 4.3)
   rails (> 6.0.1)
   ruby-debug-ide (>= 0.7.0)
   spring