diff --git a/build.sbt b/build.sbt
index 2b44841..d1aef91 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,11 +2,11 @@ import Dependencies._
 import com.typesafe.tools.mima.core._
 import sbt.internal.ProjectMatrix
 
-val scala212 = "2.12.15"
-val scala213 = "2.13.8"
-val scala3 = "3.1.0"
+val scala212 = "2.12.18"
+val scala213 = "2.13.11"
+val scala3 = "3.3.0"
 
-ThisBuild / version := "0.12.0-SNAPSHOT"
+ThisBuild / version := "0.13.0"
 ThisBuild / scalaVersion := scala212
 lazy val allScalaVersions = Seq(scala212, scala213, scala3)
 
diff --git a/core/src/main/scala/sjsonnew/package.scala b/core/src/main/scala/sjsonnew/package.scala
index d869653..565b56e 100644
--- a/core/src/main/scala/sjsonnew/package.scala
+++ b/core/src/main/scala/sjsonnew/package.scala
@@ -16,7 +16,19 @@
 
 import scala.reflect.ClassTag
 
-package object sjsonnew {
+package object sjsonnew
+  extends PrimitiveFormats
+  with StandardFormats
+  with TupleFormats
+  with CollectionFormats
+  with AdditionalFormats
+  with UnionFormats
+  with FlatUnionFormats
+  with IsoFormats
+  with JavaPrimitiveFormats
+  with ThrowableFormats
+  with ImplicitHashWriters
+ {
   def deserializationError(msg: String, cause: Throwable = null, fieldNames: List[String] = Nil) = throw new DeserializationException(msg, cause, fieldNames)
   def serializationError(msg: String) = throw new SerializationException(msg)
 
diff --git a/project/build.properties b/project/build.properties
index 563a014..875b706 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.7.2
+sbt.version=1.9.2
diff --git a/support/murmurhash/src/test/scala/sjsonnew/support/murmurhash/MurmurhashSpec.scala b/support/murmurhash/src/test/scala/sjsonnew/support/murmurhash/MurmurhashSpec.scala
index a2baf99..79a4971 100644
--- a/support/murmurhash/src/test/scala/sjsonnew/support/murmurhash/MurmurhashSpec.scala
+++ b/support/murmurhash/src/test/scala/sjsonnew/support/murmurhash/MurmurhashSpec.scala
@@ -21,7 +21,7 @@ import org.scalatest.flatspec.AnyFlatSpec
 import BUtil._
 import LList._
 
-class MurmurhashSpec extends AnyFlatSpec with BasicJsonProtocol {
+class MurmurhashSpec extends AnyFlatSpec {
   "The IntJsonFormat" should "convert an Int to an int hash" in {
     assert(Hasher.hashUnsafe[Int](1) === 1527037976)
   }
diff --git a/support/spray/src/test/scala/sjsonnew/support/spray/CollectionFormatsSpec.scala b/support/spray/src/test/scala/sjsonnew/support/spray/CollectionFormatsSpec.scala
index ba01378..9e4c59b 100644
--- a/support/spray/src/test/scala/sjsonnew/support/spray/CollectionFormatsSpec.scala
+++ b/support/spray/src/test/scala/sjsonnew/support/spray/CollectionFormatsSpec.scala
@@ -21,7 +21,7 @@ package support.spray
 import java.util.Arrays
 import spray.json.{ JsArray, JsNumber, JsObject, JsString, JsValue }
 
-object CollectionFormatsSpec extends verify.BasicTestSuite with BasicJsonProtocol {
+object CollectionFormatsSpec extends verify.BasicTestSuite {
   case class Person(name: String, value: List[Int], ary: Array[Int],
     m: Map[String, Int], vs: Vector[Int])
   implicit object PersonFormat extends JsonFormat[Person] {
diff --git a/support/spray/src/test/scala/sjsonnew/support/spray/IsoLListFormatSpec.scala b/support/spray/src/test/scala/sjsonnew/support/spray/IsoLListFormatSpec.scala
index 7990e3a..8456d37 100644
--- a/support/spray/src/test/scala/sjsonnew/support/spray/IsoLListFormatSpec.scala
+++ b/support/spray/src/test/scala/sjsonnew/support/spray/IsoLListFormatSpec.scala
@@ -19,7 +19,7 @@ package support.spray
 
 import spray.json.{ JsArray, JsNumber, JsString, JsObject }
 
-object IsoLListFormatSpec extends verify.BasicTestSuite with BasicJsonProtocol {
+object IsoLListFormatSpec extends verify.BasicTestSuite {
   sealed trait Contact
   case class Person(name: String, value: Option[Int]) extends Contact
   case class Organization(name: String, value: Option[Int]) extends Contact
diff --git a/support/spray/src/test/scala/sjsonnew/support/spray/JavaPrimitiveSpec.scala b/support/spray/src/test/scala/sjsonnew/support/spray/JavaPrimitiveSpec.scala
index 9219235..1758ec7 100644
--- a/support/spray/src/test/scala/sjsonnew/support/spray/JavaPrimitiveSpec.scala
+++ b/support/spray/src/test/scala/sjsonnew/support/spray/JavaPrimitiveSpec.scala
@@ -22,7 +22,7 @@ import java.lang.{ Integer => JInteger, Long => JLong, Boolean => JBoolean,
   Float => JFloat, Double => JDouble, Byte => JByte, Short => JShort,
   Character => JCharacter }
 
-object JavaPrimitiveFormatsSpec extends verify.BasicTestSuite with BasicJsonProtocol {
+object JavaPrimitiveFormatsSpec extends verify.BasicTestSuite {
   test("The JIntegerJsonFormat") {
     // "convert an JInteger to a JsNumber" in {
     Predef.assert(Converter.toJsonUnsafe[JInteger](42: JInteger) == JsNumber(42))
diff --git a/support/spray/src/test/scala/sjsonnew/support/spray/LListFormatSpec.scala b/support/spray/src/test/scala/sjsonnew/support/spray/LListFormatSpec.scala
index 061415b..68853af 100644
--- a/support/spray/src/test/scala/sjsonnew/support/spray/LListFormatSpec.scala
+++ b/support/spray/src/test/scala/sjsonnew/support/spray/LListFormatSpec.scala
@@ -20,7 +20,7 @@ package support.spray
 import java.util.Arrays
 import spray.json.{ JsArray, JsNumber, JsString, JsObject }
 
-object LListFormatsSpec extends verify.BasicTestSuite with BasicJsonProtocol {
+object LListFormatsSpec extends verify.BasicTestSuite {
   val empty = LNil
   val emptyObject = JsObject()
   val list = ("Z", 2) :*: ("a", 1) :*: LNil
diff --git a/support/spray/src/test/scala/sjsonnew/support/spray/PrimitiveFormatsSpec.scala b/support/spray/src/test/scala/sjsonnew/support/spray/PrimitiveFormatsSpec.scala
index ffb64dc..5fb2c36 100644
--- a/support/spray/src/test/scala/sjsonnew/support/spray/PrimitiveFormatsSpec.scala
+++ b/support/spray/src/test/scala/sjsonnew/support/spray/PrimitiveFormatsSpec.scala
@@ -20,7 +20,7 @@ package support.spray
 
 import spray.json.{ JsValue, JsNumber, JsString, JsNull, JsTrue, JsFalse }
 
-object PritimiveFormatsSpec extends verify.BasicTestSuite with BasicJsonProtocol {
+object PritimiveFormatsSpec extends verify.BasicTestSuite {
 
   test("The IntJsonFormat") {
     // "convert an Int to a JsNumber"
diff --git a/support/spray/src/test/scala/sjsonnew/support/spray/StandardFormatsSpec.scala b/support/spray/src/test/scala/sjsonnew/support/spray/StandardFormatsSpec.scala
index e044e8e..30218c1 100644
--- a/support/spray/src/test/scala/sjsonnew/support/spray/StandardFormatsSpec.scala
+++ b/support/spray/src/test/scala/sjsonnew/support/spray/StandardFormatsSpec.scala
@@ -21,7 +21,7 @@ package support.spray
 import spray.json.{ JsValue, JsNumber, JsString, JsNull, JsTrue, JsFalse, JsObject }
 import scala.Right
 
-object StandardFormatsSpec extends verify.BasicTestSuite with BasicJsonProtocol {
+object StandardFormatsSpec extends verify.BasicTestSuite {
   case class Person(name: Option[String], value: Option[Int])
   implicit object PersonFormat extends JsonFormat[Person] {
     def write[J](x: Person, builder: Builder[J]): Unit = {
diff --git a/support/spray/src/test/scala/sjsonnew/support/spray/ThrowableFormatsSpec.scala b/support/spray/src/test/scala/sjsonnew/support/spray/ThrowableFormatsSpec.scala
index 970bdba..cbbff0a 100644
--- a/support/spray/src/test/scala/sjsonnew/support/spray/ThrowableFormatsSpec.scala
+++ b/support/spray/src/test/scala/sjsonnew/support/spray/ThrowableFormatsSpec.scala
@@ -17,7 +17,7 @@
 package sjsonnew
 package support.spray
 
-object ThrowableFormatsSpec extends verify.BasicTestSuite with BasicJsonProtocol {
+object ThrowableFormatsSpec extends verify.BasicTestSuite {
   test("The throwableFormat round trip") {
     val t: Throwable = new Exception("foo", new Exception("bar"))
 
diff --git a/support/spray/src/test/scala/sjsonnew/support/spray/TupleFormatsSpec.scala b/support/spray/src/test/scala/sjsonnew/support/spray/TupleFormatsSpec.scala
index e725c6b..38e48ca 100644
--- a/support/spray/src/test/scala/sjsonnew/support/spray/TupleFormatsSpec.scala
+++ b/support/spray/src/test/scala/sjsonnew/support/spray/TupleFormatsSpec.scala
@@ -21,7 +21,7 @@ package support.spray
 import spray.json.{ JsValue, JsNumber, JsString, JsNull, JsTrue, JsFalse, JsArray }
 import scala.Right
 
-object TupleFormatsSpec extends verify.BasicTestSuite with BasicJsonProtocol {
+object TupleFormatsSpec extends verify.BasicTestSuite {
 
   test("The tuple1Format") {
     // "convert (42) to a JsNumber"
diff --git a/support/spray/src/test/scala/sjsonnew/support/spray/UnionFormatSpec.scala b/support/spray/src/test/scala/sjsonnew/support/spray/UnionFormatSpec.scala
index 3358834..a69dd6c 100644
--- a/support/spray/src/test/scala/sjsonnew/support/spray/UnionFormatSpec.scala
+++ b/support/spray/src/test/scala/sjsonnew/support/spray/UnionFormatSpec.scala
@@ -21,7 +21,7 @@ import java.util.Arrays
 import spray.json.{ JsArray, JsNumber, JsString, JsObject }
 import LList._
 
-object UnionFormatsSpec extends verify.BasicTestSuite with BasicJsonProtocol {
+object UnionFormatsSpec extends verify.BasicTestSuite {
   sealed trait Fruit
   case class Apple() extends Fruit
   sealed trait Citrus extends Fruit