diff --git a/Gemfile b/Gemfile
index 10ea0e460a3055795fa463f72995b14670bdd9c5..f4ad546d714bad7a745b6b82bb106080ac2a0f43 100644
--- a/Gemfile
+++ b/Gemfile
@@ -33,7 +33,7 @@ gem 'omniauth_openid_connect', '~> 0.3.5'
 gem 'omniauth-twitter', '~> 1.4.0'
 gem 'pagy', '~> 3.11.0'
 gem 'pluck_to_hash', '~> 1.0.2'
-gem 'puma', '~> 4.3.8'
+gem 'puma', '~> 4.3.9'
 gem 'rails', '~> 5.2.6'
 gem 'random_password', '~> 0.1.1'
 gem "recaptcha", '~> 5.7.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index 39d4ec6f14f55ff2a1cd9bbeea2d721c25e13633..d30786538899be19333d12d7d22f6ae76018dd8e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -227,7 +227,7 @@ GEM
     multi_xml (0.6.0)
     multipart-post (2.1.1)
     net-ldap (0.17.0)
-    nio4r (2.5.7)
+    nio4r (2.5.8)
     nokogiri (1.12.5)
       mini_portile2 (~> 2.6.1)
       racc (~> 1.4)
@@ -285,7 +285,7 @@ GEM
       activesupport (>= 4.0.2)
     popper_js (1.16.0)
     public_suffix (4.0.6)
-    puma (4.3.8)
+    puma (4.3.9)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
@@ -496,7 +496,7 @@ DEPENDENCIES
   pagy (~> 3.11.0)
   pg (~> 0.18)
   pluck_to_hash (~> 1.0.2)
-  puma (~> 4.3.8)
+  puma (~> 4.3.9)
   rails (~> 5.2.6)
   rails-controller-testing (~> 1.0)
   random_password (~> 0.1.1)