diff --git a/Gemfile b/Gemfile
index 19edab5..6d08c7d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 6.0.3', '>= 6.0.3.2'
 # Use postgresql as the database for Active Record
 gem 'pg', '>= 0.18', '< 2.0'
 # Use Puma as the app server
-gem 'puma', '~> 5.1'
+gem 'puma', '~> 5.5'
 # 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 367023e..908e29e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -127,7 +127,7 @@ GEM
     minitest (5.14.1)
     msgpack (1.3.3)
     netrc (0.11.0)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
     orm_adapter (0.5.0)
@@ -135,7 +135,7 @@ GEM
     pry (0.13.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    puma (5.1.1)
+    puma (5.5.1)
       nio4r (~> 2.0)
     rack (2.2.3)
     rack-test (1.1.0)
@@ -217,7 +217,7 @@ DEPENDENCIES
   listen (~> 3.2)
   pg (>= 0.18, < 2.0)
   pry
-  puma (~> 5.1)
+  puma (~> 5.5)
   rails (~> 6.0.3, >= 6.0.3.2)
   spring
   spring-watcher-listen (~> 2.0.0)