diff --git a/Gemfile b/Gemfile
index 868c97ba3..8973c5792 100644
--- a/Gemfile
+++ b/Gemfile
@@ -58,7 +58,7 @@ gem 'parser', '~> 2.5.3'
 gem 'pg'
 gem 'postrank-uri', '>= 1.0.24'
 gem 'pry-byebug', group: %i[development test]
-gem 'puma', '~> 4.3' # Use Puma as the app server
+gem 'puma', '~> 5.6' # Use Puma as the app server
 gem 'rack-test', '0.7.0', group: %i[test] # rack-test >= 0.71 does not work with older Capybara versions (< 2.17). See #214 for more details
 gem 'rails-controller-testing', group: %i[test]
 gem 'rdf', '~> 3.1.15' # rdf 3.2.0 removed SerializedTransaction which ldp requires
diff --git a/Gemfile.lock b/Gemfile.lock
index 4436734e8..597431283 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -893,7 +893,7 @@ GEM
       pry (>= 0.13, < 0.15)
     psych (3.3.4)
     public_suffix (4.0.7)
-    puma (4.3.12)
+    puma (5.6.7)
       nio4r (~> 2.0)
     qa (5.10.0)
       activerecord-import
@@ -1342,7 +1342,7 @@ DEPENDENCIES
   pg
   postrank-uri (>= 1.0.24)
   pry-byebug
-  puma (~> 4.3)
+  puma (~> 5.6)
   rack-test (= 0.7.0)
   rails (~> 5.2.5)
   rails-controller-testing