diff --git a/Gemfile.lock b/Gemfile.lock
index 01455c8..ae48421 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,7 +2,7 @@ PATH
   remote: .
   specs:
     fast_jsonapi (1.0.17)
-      activesupport (~> 5.0)
+      activesupport (>= 4.2)
       multi_json (~> 1.12)
 
 GEM
@@ -101,7 +101,7 @@ PLATFORMS
 
 DEPENDENCIES
   active_model_serializers (~> 0.10.7)
-  activerecord (~> 5.0)
+  activerecord (>= 4.2)
   bundler (~> 1.0)
   byebug
   fast_jsonapi!
diff --git a/fast_jsonapi.gemspec b/fast_jsonapi.gemspec
index dbb32f0..1600f55 100644
--- a/fast_jsonapi.gemspec
+++ b/fast_jsonapi.gemspec
@@ -20,9 +20,9 @@ Gem::Specification.new do |gem|
   gem.rubygems_version = "2.5.1"
   gem.summary = "fast JSON API(jsonapi.org) serializer"
 
-  gem.add_runtime_dependency(%q<activesupport>, ["~> 5.0"])
+  gem.add_runtime_dependency(%q<activesupport>, [">= 4.2"])
   gem.add_runtime_dependency(%q<multi_json>, ["~> 1.12"])
-  gem.add_development_dependency(%q<activerecord>, ["~> 5.0"])
+  gem.add_development_dependency(%q<activerecord>, [">= 4.2"])
   gem.add_development_dependency(%q<skylight>, ["~> 1.3"])
   gem.add_development_dependency(%q<rspec>, ["~> 3.5.0"])
   gem.add_development_dependency(%q<oj>, ["~> 3.3"])