diff --git a/currency_cloud.gemspec b/currency_cloud.gemspec
index ebbee1e..1a2a8d8 100644
--- a/currency_cloud.gemspec
+++ b/currency_cloud.gemspec
@@ -16,6 +16,7 @@ Gem::Specification.new do |s|
   s.add_dependency('httparty', '~> 0.23.1')
   s.add_dependency('json', '>= 2.12.2', '< 2.17.0')
   s.add_dependency('base64', '~> 0.3.0')
+  s.add_dependency('ostruct', '~> 0.6.0')
 
   s.add_development_dependency('rake', '~> 13.3.0')
   s.add_development_dependency('addressable', '<= 2.9.0')
diff --git a/spec/integration/errors_spec.rb b/spec/integration/errors_spec.rb
index 165a8a5..850f24f 100644
--- a/spec/integration/errors_spec.rb
+++ b/spec/integration/errors_spec.rb
@@ -53,7 +53,8 @@
       expect(0).to eq 1, 'expected exception that was not raised'
     rescue CurrencyCloud::BadRequestError => error
       expect(error.code).to eq('auth_invalid_user_login_details')
-      expect(error.raw_response).to_not be_nil
+      expect(error.raw_response.body).to_not be_nil
+      expect(error.raw_response.body).to_not be_empty
       expect(error.status_code).to eq(400)
       expect(error.messages.length).to eq(1)
 
@@ -74,7 +75,8 @@
       expect(0).to eq 1, 'expected exception that was not raised'
     rescue CurrencyCloud::AuthenticationError => error
       expect(error.code).to eq('auth_failed')
-      expect(error.raw_response).to_not be_nil
+      expect(error.raw_response.body).to_not be_nil
+      expect(error.raw_response.body).to_not be_empty
       expect(error.status_code).to eq(401)
       expect(error.messages.length).to eq(1)
 
@@ -119,7 +121,8 @@
       expect(0).to eq 1, 'expected exception that was not raised'
     rescue CurrencyCloud::ForbiddenError => error
       expect(error.code).to eq('auth_failed')
-      expect(error.raw_response).to_not be_nil
+      expect(error.raw_response.body).to_not be_nil
+      expect(error.raw_response.body).to_not be_empty
       expect(error.status_code).to eq(403)
       expect(error.messages.length).to eq(1)
 
@@ -138,7 +141,8 @@
       expect(0).to eq 1, 'expected exception that was not raised'
     rescue CurrencyCloud::NotFoundError => error
       expect(error.code).to eq('beneficiary_not_found')
-      expect(error.raw_response).to_not be_nil
+      expect(error.raw_response.body).to_not be_nil
+      expect(error.raw_response.body).to_not be_empty
       expect(error.status_code).to eq(404)
       expect(error.messages.length).to eq(1)
 
@@ -156,7 +160,8 @@
       expect(0).to eq 1, 'expected exception that was not raised'
     rescue CurrencyCloud::InternalApplicationError => error
       expect(error.code).to eq('internal_application_error')
-      expect(error.raw_response).to_not be_nil
+      expect(error.raw_response.body).to_not be_nil
+      expect(error.raw_response.body).to_not be_empty
       expect(error.status_code).to eq(500)
       expect(error.messages.length).to eq(1)
 
@@ -177,7 +182,8 @@
       expect(0).to eq 1, 'expected exception that was not raised'
     rescue CurrencyCloud::TooManyRequestsError => error
       expect(error.code).to eq('too_many_requests')
-      expect(error.raw_response).to_not be_nil
+      expect(error.raw_response.body).to_not be_nil
+      expect(error.raw_response.body).to_not be_empty
       expect(error.status_code).to eq(429)
       expect(error.messages.length).to eq(1)