diff --git a/Gemfile b/Gemfile
index 6e11be0..bd10ae1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem "pg", ">= 0.18", "< 2.0"
 gem "rails", "~> 6.0"
 
 gem "bootsnap", "~> 1.3", require: false
-gem "puma", "~> 3.0"
+gem "puma", "~> 4.3"
 
 gem "jbuilder", "~> 2.5"
 gem "jb"
diff --git a/Gemfile.lock b/Gemfile.lock
index d5beaf6..a5e6869 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -133,7 +133,8 @@ GEM
     parser (2.7.1.3)
       ast (~> 2.4.0)
     pg (1.2.3)
-    puma (3.12.6)
+    puma (4.3.12)
+      nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
     rack-protection (2.0.8.1)
@@ -298,7 +299,7 @@ DEPENDENCIES
   oj
   pagy
   pg (>= 0.18, < 2.0)
-  puma (~> 3.0)
+  puma (~> 4.3)
   rails (~> 6.0)
   rails-controller-testing
   rails-i18n