diff --git a/Gemfile b/Gemfile
index 5293f3b..cf2b2ea 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'actionpack', '~> 6.1.3'
 gem 'railties', '~> 6.1.3'
 
 # Use Puma as the app server
-gem 'puma', '~> 4.3.1'
+gem 'puma', '~> 4.3.9'
 # Use Capistrano for deployment
 # gem 'capistrano-rails', group: :development
 
diff --git a/Gemfile.lock b/Gemfile.lock
index d0afe2d..c16a6f0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -43,10 +43,10 @@ GEM
     mini_portile2 (2.4.0)
     minitest (5.14.4)
     msgpack (1.3.1)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
-    puma (4.3.1)
+    puma (4.3.9)
       nio4r (~> 2.0)
     rack (2.2.3)
     rack-cors (1.0.6)
@@ -83,7 +83,7 @@ DEPENDENCIES
   byebug
   doc2text (= 0.4.2)
   listen (~> 3.2.0)
-  puma (~> 4.3.1)
+  puma (~> 4.3.9)
   rack-cors
   railties (~> 6.1.3)
   tzinfo-data