diff --git a/docker/api-server/app/Gemfile b/docker/api-server/app/Gemfile
index 9ffec24..ce61430 100644
--- a/docker/api-server/app/Gemfile
+++ b/docker/api-server/app/Gemfile
@@ -6,7 +6,7 @@ ruby '2.6.4'
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 6.1.1'
 # Use Puma as the app server
-gem 'puma', '~> 5.5'
+gem 'puma', '~> 5.6'
 # 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/docker/api-server/app/Gemfile.lock b/docker/api-server/app/Gemfile.lock
index a4e6cd3..146212f 100644
--- a/docker/api-server/app/Gemfile.lock
+++ b/docker/api-server/app/Gemfile.lock
@@ -100,7 +100,7 @@ GEM
     nokogiri (1.12.5)
       mini_portile2 (~> 2.6.1)
       racc (~> 1.4)
-    puma (5.5.1)
+    puma (5.6.4)
       nio4r (~> 2.0)
     racc (1.6.0)
     rack (2.2.3)
@@ -162,7 +162,7 @@ DEPENDENCIES
   byebug
   cequel (~> 3.2)
   listen (~> 3.3)
-  puma (~> 5.5)
+  puma (~> 5.6)
   rack-cors
   rails (~> 6.1.1)
   spring