diff --git a/Gemfile b/Gemfile
index 02f5aee..cb8c6cc 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,7 +7,7 @@ ruby '2.6.3'
 
 gem 'bcrypt', '~> 3.1.13'
 gem 'bootsnap', '>= 1.4.2', require: false
-gem 'puma', '~> 5.0'
+gem 'puma', '~> 5.3'
 gem 'rails', '~> 6.0.2', '>= 6.0.2.2'
 
 # API
diff --git a/Gemfile.lock b/Gemfile.lock
index 761255b..7d82790 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -169,12 +169,14 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.2)
-    mimemagic (0.3.4)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.14.0)
     msgpack (1.3.1)
-    nio4r (2.5.2)
+    nio4r (2.5.7)
     nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
     parallel (1.19.1)
@@ -186,7 +188,7 @@ GEM
       method_source (~> 0.9.0)
     pry-rails (0.3.9)
       pry (>= 0.10.4)
-    puma (5.0.4)
+    puma (5.3.1)
       nio4r (~> 2.0)
     rack (2.2.2)
     rack-cors (1.1.1)
@@ -345,7 +347,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   pg (>= 0.18, < 2.0)
   pry-rails (~> 0.3.9)
-  puma (~> 5.0)
+  puma (~> 5.3)
   rack-cors (~> 1.1.1)
   rails (~> 6.0.2, >= 6.0.2.2)
   rails_best_practices