diff --git a/lib/drip/client/shopper_activity.rb b/lib/drip/client/shopper_activity.rb
index 6e2f248..f7b246d 100644
--- a/lib/drip/client/shopper_activity.rb
+++ b/lib/drip/client/shopper_activity.rb
@@ -18,7 +18,7 @@ def create_cart_activity_event(data = {})
         end
 
         data[:occurred_at] = Time.now.iso8601 unless data.key?(:occurred_at)
-        make_json_request :post, "v3/#{account_id}/shopper_activity/cart", data
+        make_json_request :post, "v3/#{account_id}/shopper_activity/cart", data.to_json
       end
 
       # Public: Create an order activity event.
@@ -36,7 +36,7 @@ def create_order_activity_event(data = {})
         end
 
         data[:occurred_at] = Time.now.iso8601 unless data.key?(:occurred_at)
-        make_json_request :post, "v3/#{account_id}/shopper_activity/order", data
+        make_json_request :post, "v3/#{account_id}/shopper_activity/order", data.to_json
       end
 
       # Public: Create a batch of order activity events.
@@ -57,7 +57,7 @@ def create_order_activity_events(records = [])
           record[:occurred_at] = Time.now.iso8601 unless record.key?(:occurred_at)
         end
 
-        make_json_request :post, "v3/#{account_id}/shopper_activity/order/batch", { orders: records }
+        make_json_request :post, "v3/#{account_id}/shopper_activity/order/batch", { orders: records.to_json }
       end
 
       # Public: Create a product activity event.
@@ -73,7 +73,7 @@ def create_product_activity_event(data = {})
         end
 
         data[:occurred_at] = Time.now.iso8601 unless data.key?(:occurred_at)
-        make_json_request :post, "v3/#{account_id}/shopper_activity/product", data
+        make_json_request :post, "v3/#{account_id}/shopper_activity/product", data.to_json
       end
     end
   end
diff --git a/test/drip/client/shopper_activity_test.rb b/test/drip/client/shopper_activity_test.rb
index 629dacb..1745b2d 100644
--- a/test/drip/client/shopper_activity_test.rb
+++ b/test/drip/client/shopper_activity_test.rb
@@ -35,7 +35,7 @@ def setup
     end
 
     should "send the right request" do
-      expected = Drip::Response.new(@response_status, JSON.parse(@response_body))
+      expected = Drip::Response.new(@response_status, @response_body.to_json)
       assert_equal expected, @client.create_cart_activity_event(@options)
     end
 
@@ -84,7 +84,7 @@ def setup
     end
 
     should "send the right request" do
-      expected = Drip::Response.new(@response_status, JSON.parse(@response_body))
+      expected = Drip::Response.new(@response_status, @response_body.to_json)
       assert_equal expected, @client.create_order_activity_event(@options)
     end
 
@@ -137,7 +137,7 @@ def setup
     end
 
     should "send the right request" do
-      expected = Drip::Response.new(@response_status, JSON.parse(@response_body))
+      expected = Drip::Response.new(@response_status, @response_body.to_json)
       assert_equal expected, @client.create_order_activity_events(@records)
     end
 
@@ -177,7 +177,7 @@ def setup
     end
 
     should "send the right request" do
-      expected = Drip::Response.new(@response_status, JSON.parse(@response_body))
+      expected = Drip::Response.new(@response_status, @response_body.to_json)
       assert_equal expected, @client.create_product_activity_event(@options)
     end