diff --git a/Gemfile b/Gemfile
index 57c42ef2..74acb643 100644
--- a/Gemfile
+++ b/Gemfile
@@ -13,7 +13,7 @@ end
 gem 'rails', '~> 5.2.3'
 
 # Use Puma as the app server
-gem 'puma', '~> 3.0'
+gem 'puma', '~> 3.12'
 
 # respond_to methods have been extracted to the responders gem
 # http://edgeguides.rubyonrails.org/upgrading_ruby_on_rails.html#responders
diff --git a/Gemfile.lock b/Gemfile.lock
index eb402a48..baaa3e99 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -380,7 +380,7 @@ GEM
       slop (~> 3.4)
     psych (3.1.0)
     public_suffix (3.1.1)
-    puma (3.12.1)
+    puma (3.12.2)
     rack (2.0.8)
     rack-openid (1.3.1)
       rack (>= 1.1.0)
@@ -681,7 +681,7 @@ DEPENDENCIES
   piwik_analytics (~> 1.0.1)
   prawn-qrcode
   prawn-rails
-  puma (~> 3.0)
+  puma (~> 3.12)
   rails (~> 5.2.3)
   rails-assets-bootstrap-markdown!
   rails-assets-bootstrap-select!