diff --git a/Gemfile b/Gemfile
index 57c42ef2..c582f04f 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', '~> 5.3'
 
 # 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 b6a4708e..dd380dca 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -125,10 +125,8 @@ GEM
       aws_cf_signer
       rest-client
     cocoon (1.2.12)
-    codecov (0.1.14)
-      json
-      simplecov
-      url
+    codecov (0.5.2)
+      simplecov (>= 0.15, < 0.22)
     coderay (1.1.1)
     concurrent-ruby (1.1.5)
     connection_pool (2.2.2)
@@ -162,7 +160,7 @@ GEM
     devise_ichain_authenticatable (0.3.2)
       devise (>= 2.2)
     diff-lcs (1.3)
-    docile (1.3.1)
+    docile (1.4.0)
     domain_name (0.5.20180417)
       unf (>= 0.0.5, < 1.0.0)
     dotenv (2.7.2)
@@ -255,7 +253,7 @@ GEM
       thor (>= 0.14, < 2.0)
     jquery-ui-rails (4.2.1)
       railties (>= 3.2.16)
-    json (2.2.0)
+    json (2.5.1)
     json-schema (2.8.1)
       addressable (>= 2.4)
     jsonapi-renderer (0.2.0)
@@ -283,7 +281,9 @@ GEM
     mime-types (3.2.2)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2018.0812)
-    mimemagic (0.3.2)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mina (1.2.3)
       open4 (~> 1.3.4)
       rake
@@ -380,7 +380,8 @@ GEM
       slop (~> 3.4)
     psych (3.1.0)
     public_suffix (3.1.1)
-    puma (3.12.1)
+    puma (5.3.1)
+      nio4r (~> 2.0)
     rack (2.0.8)
     rack-openid (1.3.1)
       rack (>= 1.1.0)
@@ -532,11 +533,12 @@ GEM
     shellany (0.0.1)
     shoulda-matchers (4.0.1)
       activesupport (>= 4.2.0)
-    simplecov (0.16.1)
+    simplecov (0.21.2)
       docile (~> 1.1)
-      json (>= 1.8, < 3)
-      simplecov-html (~> 0.10.0)
-    simplecov-html (0.10.2)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.3)
     sixarm_ruby_unaccent (1.2.0)
     skylight (3.1.5)
       skylight-core (= 3.1.5)
@@ -587,7 +589,6 @@ GEM
     unicode_utils (1.4.0)
     unobtrusive_flash (3.3.1)
       railties
-    url (0.3.2)
     warden (1.2.8)
       rack (>= 2.0.6)
     web-console (3.7.0)
@@ -681,7 +682,7 @@ DEPENDENCIES
   piwik_analytics (~> 1.0.1)
   prawn-qrcode
   prawn-rails
-  puma (~> 3.0)
+  puma (~> 5.3)
   rails (~> 5.2.3)
   rails-assets-bootstrap-markdown!
   rails-assets-bootstrap-select!