Lock ActiveResource version ~> 4.x

Gemfile.lock

@@ -1,21 +1,21 @@
 PATH
   remote: .
   specs:
-    shopify_api (3.2.0)
-      activeresource (>= 3.0.0)
+    shopify_api (3.2.1)
+      activeresource (~> 4.0.0)
       thor (>= 0.14.4)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    activemodel (4.0.0)
-      activesupport (= 4.0.0)
+    activemodel (4.0.3)
+      activesupport (= 4.0.3)
       builder (~> 3.1.0)
     activeresource (4.0.0)
       activemodel (~> 4.0)
       activesupport (~> 4.0)
       rails-observers (~> 0.1.1)
-    activesupport (4.0.0)
+    activesupport (4.0.3)
       i18n (~> 0.6, >= 0.6.4)
       minitest (~> 4.2)
       multi_json (~> 1.3)
@@ -29,7 +29,7 @@ GEM
     minitest (4.7.5)
     mocha (0.14.0)
       metaclass (~> 0.0.1)
-    multi_json (1.8.2)
+    multi_json (1.8.4)
     rails-observers (0.1.2)
       activemodel (~> 4.0)
     rake (10.1.0)

shopify_api.gemspec

@@ -24,7 +24,7 @@ Gem::Specification.new do |s|
   s.summary = %q{ShopifyAPI is a lightweight gem for accessing the Shopify admin REST web services}
   s.license = 'MIT'
 
-  s.add_dependency("activeresource", [">= 3.0.0"])
+  s.add_dependency("activeresource", ["~> 4.0.0"])
   s.add_dependency("thor", [">= 0.14.4"])
   
   if s.respond_to?(:add_development_dependency)