diff --git a/Gemfile b/Gemfile
index 5d4c572..24d2122 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,7 +11,7 @@ gem "elasticsearch"
 gem "elasticsearch-model"
 gem "elasticsearch-persistence"
 gem "jbuilder", "~> 2.11"
-gem "puma", "~> 5.3"
+gem "puma", "~> 5.6"
 gem "rails"
 gem "sanitize"
 gem "htmlentities"
diff --git a/Gemfile.lock b/Gemfile.lock
index 890513a..55dfb0a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -136,7 +136,7 @@ GEM
     msgpack (1.4.2)
     multi_json (1.14.1)
     multipart-post (2.1.1)
-    nio4r (2.5.7)
+    nio4r (2.5.8)
     nokogiri (1.11.7)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
@@ -146,7 +146,7 @@ GEM
     parser (3.0.0.0)
       ast (~> 2.4.1)
     public_suffix (4.0.6)
-    puma (5.3.2)
+    puma (5.6.4)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
@@ -283,7 +283,7 @@ DEPENDENCIES
   iso_country_codes
   jbuilder (~> 2.11)
   listen (>= 3.0.5, < 3.6)
-  puma (~> 5.3)
+  puma (~> 5.6)
   rails
   rspec-rails (~> 4.0)
   rubocop-rails_config