diff --git a/Gemfile b/Gemfile
index d715239..66fcf8e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -13,7 +13,7 @@ gem 'haml-rails', '~> 2.0'
 gem 'jbuilder', '~> 2.9'
 gem 'pg', '~> 1.1'
 gem 'progress_bar', '~> 1.3'
-gem 'puma', '~> 4.1'
+gem 'puma', '~> 4.3'
 gem 'rails', '5.2.3' # @drg skip
 gem 'sanitize', '~> 5.0'
 gem 'seedbank', '~> 0.5'
diff --git a/Gemfile.lock b/Gemfile.lock
index 58ef1e3..10fab83 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -135,13 +135,15 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.2)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.11.3)
     msgpack (1.3.1)
     multipart-post (2.1.1)
-    nio4r (2.5.1)
+    nio4r (2.5.8)
     nokogiri (1.10.4)
       mini_portile2 (~> 2.4.0)
     nokogumbo (2.0.1)
@@ -164,7 +166,7 @@ GEM
       pry (~> 0.10)
     pry-rails (0.3.9)
       pry (>= 0.10.4)
-    puma (4.1.0)
+    puma (4.3.12)
       nio4r (~> 2.0)
     rack (2.0.7)
     rack-cors (1.0.3)
@@ -321,7 +323,7 @@ DEPENDENCIES
   pry (~> 0.12)
   pry-byebug (~> 3.7)
   pry-rails (~> 0.3)
-  puma (~> 4.1)
+  puma (~> 4.3)
   rack-cors (~> 1.0)
   rails (= 5.2.3)
   rspec-graphql_matchers!