diff --git a/app/models/domain.rb b/app/models/domain.rb
index ced00a9..02aa28a 100644
--- a/app/models/domain.rb
+++ b/app/models/domain.rb
@@ -22,7 +22,7 @@ def self.register(account, host) # rubocop:disable Metrics/AbcSize, Metrics/Meth
       return Domain.register_development_domains(account, host)
     end
 
-    response = Domain.render_service_request('', Net::HTTP::Post, "{\"name\":\"#{host}\"}")
+    response = Domain.render_service_request('', Net::HTTP::Post, { name: host }.to_json)
 
     unless response.code == '201'
       raise "Error creating domain #{host} in Render - code #{response.code} \"#{response.body}\""