diff --git a/spec/support/rails_app/Gemfile b/spec/support/rails_app/Gemfile
index 1f1c45a..96a751e 100644
--- a/spec/support/rails_app/Gemfile
+++ b/spec/support/rails_app/Gemfile
@@ -16,7 +16,7 @@ gem 'sqlite3'
 gem 'active_model_serializers'
 
 # Use Puma as the app server
-gem 'puma', '~> 3.0'
+gem 'puma', '~> 3.12'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5.0'
 # Use Uglifier as compressor for JavaScript assets
diff --git a/spec/support/rails_app/Gemfile.lock b/spec/support/rails_app/Gemfile.lock
index d6ab235..bf51f6f 100644
--- a/spec/support/rails_app/Gemfile.lock
+++ b/spec/support/rails_app/Gemfile.lock
@@ -68,10 +68,10 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    jsonapi (0.1.1.beta5)
-      jsonapi-parser (= 0.1.1.beta2)
+    jsonapi (0.1.1.beta6)
+      jsonapi-parser (= 0.1.1.beta3)
       jsonapi-renderer (= 0.1.1.beta1)
-    jsonapi-parser (0.1.1.beta2)
+    jsonapi-parser (0.1.1.beta3)
     jsonapi-renderer (0.1.1.beta1)
     listen (3.0.8)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -92,7 +92,7 @@ GEM
       mini_portile2 (~> 2.1.0)
       pkg-config (~> 1.1.7)
     pkg-config (1.1.7)
-    puma (3.6.0)
+    puma (3.12.6)
     rack (2.0.1)
     rack-test (0.6.3)
       rack (>= 1.0)
@@ -171,7 +171,7 @@ DEPENDENCIES
   jbuilder (~> 2.5)
   jquery-rails
   listen (~> 3.0.5)
-  puma (~> 3.0)
+  puma (~> 3.12)
   rails (~> 5.0.0)
   sass-rails (~> 5.0)
   spring