diff --git a/Gemfile b/Gemfile
index 8fbaa28..daaca1f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -13,7 +13,7 @@ gem 'dry-types'
 gem 'jbuilder', '~> 2.7'
 gem 'mailgun_rails'
 gem 'pg', '>= 0.18', '< 2.0'
-gem 'puma', '~> 4.1'
+gem 'puma', '~> 4.3'
 gem 'pundit'
 gem 'rails', '~> 6.0.3', '>= 6.0.3.2'
 gem 'sass-rails', '>= 6'
diff --git a/Gemfile.lock b/Gemfile.lock
index 7f5706b..d7afda4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -172,7 +172,7 @@ GEM
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
     netrc (0.11.0)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
     orm_adapter (0.5.0)
@@ -184,7 +184,7 @@ GEM
       ast (~> 2.4.1)
     pg (1.2.3)
     public_suffix (4.0.5)
-    puma (4.3.5)
+    puma (4.3.11)
       nio4r (~> 2.0)
     pundit (2.1.0)
       activesupport (>= 3.0.0)
@@ -385,7 +385,7 @@ DEPENDENCIES
   mailgun_rails
   overcommit
   pg (>= 0.18, < 2.0)
-  puma (~> 4.1)
+  puma (~> 4.3)
   pundit
   rails (~> 6.0.3, >= 6.0.3.2)
   rails-controller-testing