diff --git a/Gemfile b/Gemfile
index 850540b..aa6776a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,7 +3,7 @@
 source 'https://rubygems.org'
 
 # Framework
-gem 'puma', '~> 6.4.2'
+gem 'puma', '~> 6.4.3'
 gem 'sinatra', '~> 3.1.0'
 
 # Asset pipeline
diff --git a/Gemfile.lock b/Gemfile.lock
index 817ee58..ee48748 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -19,12 +19,12 @@ GEM
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     mutex_m (0.2.0)
-    nio4r (2.7.0)
+    nio4r (2.7.3)
     parallel (1.24.0)
     parser (3.2.2.4)
       ast (~> 2.4.1)
       racc
-    puma (6.4.2)
+    puma (6.4.3)
       nio4r (~> 2.0)
     racc (1.7.3)
     rack (2.2.9)
@@ -83,7 +83,7 @@ DEPENDENCIES
   m (~> 1.6.2)
   minitest (~> 5.20.0)
   mutex_m (~> 0.2.0)
-  puma (~> 6.4.2)
+  puma (~> 6.4.3)
   rake (~> 13.0.6)
   rubocop (~> 1.59)
   rubocop-minitest (~> 0.34.2)