diff --git a/.formatter.exs b/.formatter.exs
index 5a100fd..3bad048 100644
--- a/.formatter.exs
+++ b/.formatter.exs
@@ -2,5 +2,6 @@
 [
   inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"],
   line_length: 120,
-  import_deps: [:placebo]
+  import_deps: [:placebo],
+  locals_without_parens: [where: :*]
 ]
diff --git a/README.md b/README.md
index b88ef98..1468e4d 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ This package can be installed by adding `smart_city_registry` to your list of de
 
 ```elixir
 def deps do
-  [{:smart_city_registry, "~> 2.6.6"}]
+  [{:smart_city_registry, "~> 3.3.0"}]
 end
 ```
 
diff --git a/lib/smart_city/dataset/technical.ex b/lib/smart_city/dataset/technical.ex
index 23f4aaf..4db6fa5 100644
--- a/lib/smart_city/dataset/technical.ex
+++ b/lib/smart_city/dataset/technical.ex
@@ -24,11 +24,13 @@ defmodule SmartCity.Dataset.Technical do
           authHeaders: not_required(map()),
           protocol: not_required(list(String.t())),
           partitioner: not_required(%{type: String.t(), query: String.t()}),
-          private: not_required(boolean())
+          private: not_required(boolean()),
+          allow_duplicates: not_required(boolean())
         }
 
   @derive Jason.Encoder
-  defstruct cadence: "never",
+  defstruct allow_duplicates: true,
+            cadence: "never",
             credentials: false,
             dataName: nil,
             sourceHeaders: %{},
diff --git a/mix.exs b/mix.exs
index e510e98..2ef9c76 100644
--- a/mix.exs
+++ b/mix.exs
@@ -4,7 +4,7 @@ defmodule SmartCity.Registry.MixProject do
   def project do
     [
       app: :smart_city_registry,
-      version: "3.2.2",
+      version: "3.3.0",
       elixir: "~> 1.8",
       start_permanent: Mix.env() == :prod,
       deps: deps(),
diff --git a/test/unit/smart_city/dataset/technical_test.exs b/test/unit/smart_city/dataset/technical_test.exs
index e7ba136..569bd5b 100644
--- a/test/unit/smart_city/dataset/technical_test.exs
+++ b/test/unit/smart_city/dataset/technical_test.exs
@@ -1,6 +1,7 @@
 defmodule SmartCity.Dataset.TechnicalTest do
   use ExUnit.Case
-  doctest SmartCity.Dataset.Technical
+  import Checkov
+
   alias SmartCity.Dataset.Technical
 
   setup do
@@ -37,9 +38,22 @@ defmodule SmartCity.Dataset.TechnicalTest do
         })
 
       assert actual.dataName == "dataset"
-      assert actual.schema == []
-      assert actual.cadence == "never"
-      assert actual.sourceType == "remote"
+    end
+
+    data_test "field #{field} has a default value of #{default}" do
+      actual =
+        Technical.new(%{
+          dataName: "dataset",
+          orgName: "org",
+          systemName: "org__dataset",
+          sourceUrl: "https://example.com",
+          sourceFormat: "gtfs"
+        })
+
+      assert Map.get(actual, field) == default
+
+      where field: [:schema, :cadence, :sourceType, :allow_duplicates],
+            default: [[], "never", "remote", true]
     end
 
     test "returns Technical struct when given string keys", %{message: tech} do
@@ -57,11 +71,10 @@ defmodule SmartCity.Dataset.TechnicalTest do
       assert List.first(actual.transformations).foo.bar == 1
     end
 
-    test "throws error when creating Technical struct without required fields", %{message: tech} do
-      assert_raise ArgumentError, fn -> Technical.new(tech |> Map.delete("dataName")) end
-      assert_raise ArgumentError, fn -> Technical.new(tech |> Map.delete("orgName")) end
-      assert_raise ArgumentError, fn -> Technical.new(tech |> Map.delete("systemName")) end
-      assert_raise ArgumentError, fn -> Technical.new(tech |> Map.delete("sourceUrl")) end
+    data_test "throws error when creating Technical struct without required field: #{field}", %{message: tech} do
+      assert_raise ArgumentError, fn -> Technical.new(tech |> Map.delete(field)) end
+
+      where field: ["dataName", "orgName", "systemName", "sourceUrl"]
     end
   end