diff --git a/build.sbt b/build.sbt
index e11552ef01..6d376a7db1 100644
--- a/build.sbt
+++ b/build.sbt
@@ -897,7 +897,7 @@ lazy val upickle = (projectMatrix in file("json/upickle"))
   .nativePlatform(scalaVersions = scala2alive ++ scala3, settings = commonNativeSettings)
   .dependsOn(core, jsonCommon)
 
-lazy val json4sVersion = "4.0.6"
+lazy val json4sVersion = "4.0.7"
 
 lazy val json4s = (projectMatrix in file("json/json4s"))
   .settings(commonJvmSettings)
@@ -909,7 +909,7 @@ lazy val json4s = (projectMatrix in file("json/json4s"))
     ),
     scalaTest
   )
-  .jvmPlatform(scalaVersions = scala2)
+  .jvmPlatform(scalaVersions = scala2 ++ scala3)
   .dependsOn(core, jsonCommon)
 
 lazy val sprayJson = (projectMatrix in file("json/spray-json"))
diff --git a/json/json4s/src/main/scala/sttp/client3/json4s/SttpJson4sApi.scala b/json/json4s/src/main/scala/sttp/client3/json4s/SttpJson4sApi.scala
index f029f9966a..be778260d4 100644
--- a/json/json4s/src/main/scala/sttp/client3/json4s/SttpJson4sApi.scala
+++ b/json/json4s/src/main/scala/sttp/client3/json4s/SttpJson4sApi.scala
@@ -1,7 +1,7 @@
 package sttp.client3.json4s
 
 import org.json4s.{Formats, Serialization}
-import sttp.client3.{ResponseAs, _}
+import sttp.client3._
 import sttp.client3.internal.Utf8
 import sttp.client3.json._
 import sttp.model._
diff --git a/json/json4s/src/test/scala/sttp/client3/Json4sTests.scala b/json/json4s/src/test/scala/sttp/client3/Json4sTests.scala
index dba733032e..c5e0e39c9c 100644
--- a/json/json4s/src/test/scala/sttp/client3/Json4sTests.scala
+++ b/json/json4s/src/test/scala/sttp/client3/Json4sTests.scala
@@ -1,6 +1,7 @@
 package sttp.client3
 
 import org.json4s.ParserUtil.ParseException
+import org.json4s.native.Serialization
 import org.json4s.{DefaultFormats, MappingException, native}
 import org.scalatest._
 import sttp.client3.internal._
@@ -11,8 +12,8 @@ import org.scalatest.flatspec.AnyFlatSpec
 import org.scalatest.matchers.should.Matchers
 
 class Json4sTests extends AnyFlatSpec with Matchers with EitherValues {
-  implicit val serialization = native.Serialization
-  implicit val formats = DefaultFormats
+  implicit val serialization: Serialization.type = native.Serialization
+  implicit val formats: DefaultFormats.type = DefaultFormats
 
   import Json4sTests._
   import json4s._