diff --git a/Gemfile b/Gemfile
index c8c9dc8..60fe626 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,4 +7,7 @@ gem 'memory_profiler', require: false
 
 if RUBY_VERSION < "2.2"
   gem "sqlite3", "~> 1.3.0"
+elsif RUBY_VERSION < "2.5"
+  gem "sqlite3", "~> 1.4.0"
+  gem "term-ansicolor", "< 1.10.3"
 end
diff --git a/spec/serializable/attributes_spec.rb b/spec/serializable/attributes_spec.rb
index a3c9704..9591cc9 100644
--- a/spec/serializable/attributes_spec.rb
+++ b/spec/serializable/attributes_spec.rb
@@ -1,4 +1,5 @@
 require 'spec_helper'
+require 'ostruct'
 
 describe RestPack::Serializer::Attributes do
   class CustomSerializer
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 4a089ab..fdd0a23 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,5 +1,6 @@
 require 'rspec'
 require './lib/restpack_serializer'
+require 'logger'
 require './spec/fixtures/db'
 require './spec/fixtures/serializers'
 require './spec/support/factory'