diff --git a/library/src/main/scala/sbt/contraband/CodecCodeGen.scala b/library/src/main/scala/sbt/contraband/CodecCodeGen.scala
index ae8f8d7..7b3027d 100644
--- a/library/src/main/scala/sbt/contraband/CodecCodeGen.scala
+++ b/library/src/main/scala/sbt/contraband/CodecCodeGen.scala
@@ -38,6 +38,7 @@ class CodecCodeGen(
   }
 
   private def intersection: String = ScalaCodeGen.intersection(scalaVersion)
+  private def typeClassInstance: String = ScalaCodeGen.typeClassInstance(scalaVersion)
 
   override def generateEnum(s: Document, e: EnumTypeDefinition): ListMap[File, String] = {
     val fqn = fullyQualifiedName(e)
@@ -66,7 +67,7 @@ class CodecCodeGen(
          |import _root_.sjsonnew.{ Unbuilder, Builder, JsonFormat, deserializationError } 
          |
          |trait ${e.name.capitalize}Formats { $selfType
-         |  implicit lazy val ${e.name}Format: JsonFormat[$fqn] = new JsonFormat[$fqn] {
+         |  ${typeClassInstance} ${e.name}Format: JsonFormat[$fqn] = new JsonFormat[$fqn] {
          |    override def read[J](__jsOpt: Option[J], unbuilder: Unbuilder[J]): $fqn = {
          |      __jsOpt match {
          |        case Some(__js) =>
@@ -120,7 +121,7 @@ class CodecCodeGen(
          |import _root_.sjsonnew.{ Unbuilder, Builder, JsonFormat, deserializationError } 
          |
          |trait ${r.name.capitalize}Formats { $selfType
-         |  implicit lazy val ${r.name}Format: JsonFormat[$fqn] = new JsonFormat[$fqn] {
+         |  ${typeClassInstance} ${r.name}Format: JsonFormat[$fqn] = new JsonFormat[$fqn] {
          |    override def read[J](__jsOpt: Option[J], unbuilder: Unbuilder[J]): $fqn = {
          |      __jsOpt match {
          |        case Some(__js) =>
@@ -156,7 +157,7 @@ class CodecCodeGen(
              |import _root_.sjsonnew.{ deserializationError, serializationError, Builder, JsonFormat, Unbuilder } 
              |
              |trait ${name.capitalize}Formats {
-             |  implicit lazy val ${name}Format: JsonFormat[$fqn] = new JsonFormat[$fqn] {
+             |  ${typeClassInstance} ${name}Format: JsonFormat[$fqn] = new JsonFormat[$fqn] {
              |    override def read[J](__jsOpt: Option[J], unbuilder: Unbuilder[J]): $fqn = {
              |      deserializationError("No known implementation of ${i.name}.")
              |    }
@@ -181,7 +182,7 @@ class CodecCodeGen(
              |import _root_.sjsonnew.JsonFormat 
              |
              |trait ${name.capitalize}Formats { $selfType
-             |  implicit lazy val ${name}Format: JsonFormat[$fqn] = $flatUnionFormat
+             |  ${typeClassInstance} ${name}Format: JsonFormat[$fqn] = $flatUnionFormat
              |}""".stripMargin
 
       }
diff --git a/library/src/main/scala/sbt/contraband/ScalaCodeGen.scala b/library/src/main/scala/sbt/contraband/ScalaCodeGen.scala
index 99d4574..7c60160 100644
--- a/library/src/main/scala/sbt/contraband/ScalaCodeGen.scala
+++ b/library/src/main/scala/sbt/contraband/ScalaCodeGen.scala
@@ -488,4 +488,8 @@ object ScalaCodeGen {
   def intersection(scalaVersion: String): String =
     if (scalaVersion.startsWith("2.")) " with "
     else " & "
+
+  def typeClassInstance(scalaVersion: String): String =
+    if (scalaVersion.startsWith("2.")) "implicit lazy val"
+    else "given"
 }
diff --git a/library/src/test/scala/GraphQLCodecCodeGenSpec.scala b/library/src/test/scala/GraphQLCodecCodeGenSpec.scala
index 0c23587..7461f09 100644
--- a/library/src/test/scala/GraphQLCodecCodeGenSpec.scala
+++ b/library/src/test/scala/GraphQLCodecCodeGenSpec.scala
@@ -23,7 +23,7 @@ object GraphQLCodecCodeGenSpec extends BasicTestSuite with EqualLines {
         |import _root_.sjsonnew.JsonFormat
         |
         |trait InterfaceExampleFormats { self: sjsonnew.BasicJsonProtocol & generated.ChildTypeFormats =>
-        |  implicit lazy val InterfaceExampleFormat: JsonFormat[com.example.InterfaceExample] = flatUnionFormat1[com.example.InterfaceExample, com.example.ChildType]("type")
+        |  given InterfaceExampleFormat: JsonFormat[com.example.InterfaceExample] = flatUnionFormat1[com.example.InterfaceExample, com.example.ChildType]("type")
         |}""".stripMargin.stripSpace
     )
 
@@ -39,7 +39,7 @@ object GraphQLCodecCodeGenSpec extends BasicTestSuite with EqualLines {
         |import _root_.sjsonnew.{ Unbuilder, Builder, JsonFormat, deserializationError }
         |
         |trait ChildTypeFormats { self: sjsonnew.BasicJsonProtocol =>
-        |  implicit lazy val ChildTypeFormat: JsonFormat[com.example.ChildType] = new JsonFormat[com.example.ChildType] {
+        |  given ChildTypeFormat: JsonFormat[com.example.ChildType] = new JsonFormat[com.example.ChildType] {
         |    override def read[J](__jsOpt: Option[J], unbuilder: Unbuilder[J]): com.example.ChildType = {
         |      __jsOpt match {
         |        case Some(__js) =>
@@ -79,7 +79,7 @@ object GraphQLCodecCodeGenSpec extends BasicTestSuite with EqualLines {
         |import _root_.sjsonnew.JsonFormat
         |
         |trait InterfaceExampleFormats { self: sjsonnew.BasicJsonProtocol & generated.ChildTypeFormats =>
-        |  implicit lazy val InterfaceExampleFormat: JsonFormat[com.example.InterfaceExample] = flatUnionFormat1[com.example.InterfaceExample, com.example.ChildType]("type")
+        |  given InterfaceExampleFormat: JsonFormat[com.example.InterfaceExample] = flatUnionFormat1[com.example.InterfaceExample, com.example.ChildType]("type")
         |}""".stripMargin.stripSpace
     )
 
@@ -97,7 +97,7 @@ object GraphQLCodecCodeGenSpec extends BasicTestSuite with EqualLines {
         |import _root_.sjsonnew.{ Unbuilder, Builder, JsonFormat, deserializationError }
         |
         |trait ChildTypeFormats { self: sjsonnew.BasicJsonProtocol =>
-        |  implicit lazy val ChildTypeFormat: JsonFormat[com.example.ChildType] = new JsonFormat[com.example.ChildType] {
+        |  given ChildTypeFormat: JsonFormat[com.example.ChildType] = new JsonFormat[com.example.ChildType] {
         |    override def read[J](__jsOpt: Option[J], unbuilder: Unbuilder[J]): com.example.ChildType = {
         |      __jsOpt match {
         |        case Some(__js) =>
@@ -137,7 +137,7 @@ object GraphQLCodecCodeGenSpec extends BasicTestSuite with EqualLines {
         |import _root_.sjsonnew.JsonFormat
         |
         |trait InterfaceExampleFormats { self: generated.TestItemDetailFormats & com.example.StatusFormats & sjsonnew.BasicJsonProtocol & generated.ChildTypeFormats =>
-        |  implicit lazy val InterfaceExampleFormat: JsonFormat[com.example.InterfaceExample] = flatUnionFormat1[com.example.InterfaceExample, com.example.ChildType]("type")
+        |  given InterfaceExampleFormat: JsonFormat[com.example.InterfaceExample] = flatUnionFormat1[com.example.InterfaceExample, com.example.ChildType]("type")
         |}""".stripMargin.stripSpace
     )
   }