diff --git a/google-api-client.gemspec b/google-api-client.gemspec
index 97b2bfcef..aabbf67bc 100644
--- a/google-api-client.gemspec
+++ b/google-api-client.gemspec
@@ -27,5 +27,4 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency 'googleauth', '~> 0.2'
   spec.add_runtime_dependency 'thor', '~> 0.19'
   spec.add_runtime_dependency 'memoist', '~> 0.11'
-  spec.add_runtime_dependency 'virtus', '~> 1.0'
 end
diff --git a/lib/google/apis/core/json_representation.rb b/lib/google/apis/core/json_representation.rb
index 3e353f2bb..9d2021a38 100644
--- a/lib/google/apis/core/json_representation.rb
+++ b/lib/google/apis/core/json_representation.rb
@@ -14,8 +14,8 @@
 
 require 'representable/json'
 require 'representable/json/hash'
-require 'representable/coercion'
 require 'base64'
+require 'date'
 
 module Google
   module Apis
@@ -72,6 +72,11 @@ module Google
               options[:render_filter] = ->(value, _doc, *_args) { Base64.urlsafe_encode64(value) }
               options[:parse_filter] = ->(fragment, _doc, *_args) { Base64.urlsafe_decode64(fragment) }
             end
+            if options[:type] == DateTime
+              options[:render_filter] = ->(value, _doc, *_args) { value.is_a?(DateTime) ? value.rfc3339(3) : value.to_s }
+              options[:parse_filter] = ->(fragment, _doc, *_args) { DateTime.parse(fragment) }
+            end
+            
             options[:render_nil] = true
             options[:getter] = getter_fn(name)
             options[:if] = if_fn(name)
@@ -114,7 +119,6 @@ module Google
       # @see https://github.com/apotonick/representable
       class JsonRepresentation < Representable::Decorator
         include Representable::JSON
-        include Representable::Coercion
         feature JsonRepresentationSupport
       end
     end
diff --git a/spec/google/apis/core/json_representation_spec.rb b/spec/google/apis/core/json_representation_spec.rb
index 28db73dca..ebbe3e681 100644
--- a/spec/google/apis/core/json_representation_spec.rb
+++ b/spec/google/apis/core/json_representation_spec.rb
@@ -79,7 +79,7 @@ RSpec.describe Google::Apis::Core::JsonRepresentation do
     end
 
     it 'serializes date values' do
-      expect(json).to be_json_eql(%("2015-05-01T12:00:00+00:00")).at_path('dateValue')
+      expect(json).to be_json_eql(%("2015-05-01T12:00:00.000+00:00")).at_path('dateValue')
     end
 
     it 'serializes byte values to base64' do