diff --git a/spec/dummy-app/Gemfile b/spec/dummy-app/Gemfile
index dc3c835..caa5f36 100644
--- a/spec/dummy-app/Gemfile
+++ b/spec/dummy-app/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 5.2.3'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3'
 # Use Puma as the app server
-gem 'puma', '~> 4.3'
+gem 'puma', '~> 5.3'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5.0'
 # Use Uglifier as compressor for JavaScript assets
diff --git a/spec/dummy-app/Gemfile.lock b/spec/dummy-app/Gemfile.lock
index 38d7daa..26b14d5 100644
--- a/spec/dummy-app/Gemfile.lock
+++ b/spec/dummy-app/Gemfile.lock
@@ -116,17 +116,19 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (1.0.0)
-    mimemagic (0.3.5)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.14.2)
     msgpack (1.3.3)
-    nio4r (2.5.4)
+    nio4r (2.5.7)
     nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
     orm_adapter (0.5.0)
     public_suffix (4.0.6)
-    puma (4.3.6)
+    puma (5.3.1)
       nio4r (~> 2.0)
     rack (2.2.3)
     rack-test (1.1.0)
@@ -242,7 +244,7 @@ DEPENDENCIES
   faker
   jbuilder (~> 2.5)
   listen (>= 3.0.5, < 3.2)
-  puma (~> 4.3)
+  puma (~> 5.3)
   rails (~> 5.2.3)
   rollbar (~> 2.11, >= 2.11.5)
   rspec-rails