diff --git a/README.md b/README.md
index d8a3ac7..a7368e6 100644
--- a/README.md
+++ b/README.md
@@ -227,7 +227,7 @@ see something that is missing.
 ## Changelog
 
 **v2.0.0**
-
+- Removed JSON AST for json4s
 
 
 **v1.0.0
diff --git a/build.sbt b/build.sbt
index 1741d17..503806f 100644
--- a/build.sbt
+++ b/build.sbt
@@ -39,6 +39,7 @@ lazy val scalaHttp = crossProject.in(file("."))
     pomIncludeRepository := { _ => false },
 
     libraryDependencies += "com.lihaoyi" %%% "utest" % "0.4.3",
+    libraryDependencies += "org.json4s" %%% "json4s-ast" % "4.0.0-M1",
 
     testFrameworks += new TestFramework("utest.runner.Framework")
   )
diff --git a/shared/src/main/scala/fr/hmil/roshttp/body/Implicits.scala b/shared/src/main/scala/fr/hmil/roshttp/body/Implicits.scala
index 787f542..929b311 100644
--- a/shared/src/main/scala/fr/hmil/roshttp/body/Implicits.scala
+++ b/shared/src/main/scala/fr/hmil/roshttp/body/Implicits.scala
@@ -2,13 +2,9 @@ package fr.hmil.roshttp.body
 
 import java.nio.ByteBuffer
 
-import fr.hmil.roshttp.body.JSONBody._
+import org.json4s.ast.safe.JValue
 
 object Implicits {
-  implicit def stringToJSONString(value: String): JSONString = new JSONString(value)
-  implicit def intToJSONNumber(value: Int): JSONNumber = new JSONNumber(value)
-  implicit def floatToJSONNumber(value: Float): JSONNumber = new JSONNumber(value)
-  implicit def doubleToJSONNumber(value: Double): JSONNumber = new JSONNumber(value)
-  implicit def JSONObjectToJSONBody(obj: JSONObject): JSONBody = JSONBody(obj)
+  implicit def JValueToJSONBody(obj: JValue): JSONBody = JSONBody(obj)
   implicit def byteBufferToStreamBody(buff: ByteBuffer): StreamBody = StreamBody(buff)
 }
diff --git a/shared/src/main/scala/fr/hmil/roshttp/body/JSONBody.scala b/shared/src/main/scala/fr/hmil/roshttp/body/JSONBody.scala
index fb8384f..e6228cb 100644
--- a/shared/src/main/scala/fr/hmil/roshttp/body/JSONBody.scala
+++ b/shared/src/main/scala/fr/hmil/roshttp/body/JSONBody.scala
@@ -2,47 +2,40 @@ package fr.hmil.roshttp.body
 
 import java.nio.ByteBuffer
 
-import fr.hmil.roshttp.body.JSONBody.JSONValue
+import org.json4s.ast.safe._
 
 /** Allows to send arbitrarily complex JSON data.
   *
   * @param value The JSON value to send.
   */
-class JSONBody private(value: JSONValue) extends BodyPart {
+class JSONBody private(value: JValue) extends BodyPart {
   override def contentType: String = s"application/json; charset=utf-8"
-
-  override def content: ByteBuffer = ByteBuffer.wrap(value.toString.getBytes("utf-8"))
+  override def content: ByteBuffer = {
+    ByteBuffer.wrap(JSONBody.serialize(value).getBytes("utf-8"))
+  }
 }
 
 object JSONBody {
-  trait JSONValue {
-    def toString: String
-  }
+  def apply(value: JValue): JSONBody = new JSONBody(value)
 
-  class JSONNumber(value: Number) extends JSONValue {
-    override def toString: String = value.toString
-  }
-
-  class JSONString(value: String) extends JSONValue {
-    override def toString: String = "\"" + escapeJS(value) + "\""
-  }
-
-  class JSONObject(values: Map[String, JSONValue]) extends JSONValue {
-    override def toString: String = {
+  // Homebrew serialization to be removed when json4s supports scalajs
+  // https://github.com/json4s/json4s/issues/256
+  private def serialize(v: JValue): String = v match {
+    case JNull => "null"
+    case JString(s) => "\"" + escapeJS(s) + "\""
+    case JNumber(num) => num.toString
+    case JBoolean(value) => value.toString
+    case o:JObject =>
       "{" +
-        values.map({case (name, part) =>
-          "\"" + escapeJS(name) + "\"" +
-          ":" + part
+        o.value.map({case (key, value) =>
+          "\"" + escapeJS(key) + "\"" +
+            ":" + serialize(value)
         }).mkString(",") +
-      "}"
-    }
+        "}"
+    case a:JArray =>
+      "[" + a.value.map(v => serialize(v)).mkString(",") + "]"
   }
 
-  object JSONObject {
-    def apply(values: (String, JSONValue)*): JSONObject = new JSONObject(Map(values: _*))
-  }
-
-  def apply(value: JSONValue): JSONBody = new JSONBody(value)
 
   // String escapement taken from scala-js
   private final val EscapeJSChars = "\\a\\b\\t\\n\\v\\f\\r\\\"\\\\"
@@ -110,4 +103,4 @@ object JSONBody {
       }
     }
   }
-}
+}
\ No newline at end of file
diff --git a/shared/src/test/scala/fr/hmil/roshttp/client/HttpRequestSpec.scala b/shared/src/test/scala/fr/hmil/roshttp/client/HttpRequestSpec.scala
index 87e6787..6dc937c 100644
--- a/shared/src/test/scala/fr/hmil/roshttp/client/HttpRequestSpec.scala
+++ b/shared/src/test/scala/fr/hmil/roshttp/client/HttpRequestSpec.scala
@@ -3,9 +3,9 @@ package fr.hmil.roshttp.client
 import java.nio.ByteBuffer
 
 import fr.hmil.roshttp._
-import fr.hmil.roshttp.body.JSONBody._
 import fr.hmil.roshttp.body.Implicits._
 import fr.hmil.roshttp.body._
+import org.json4s.ast.safe._
 import utest._
 
 import scala.concurrent.ExecutionContext.Implicits.global
@@ -170,14 +170,14 @@ object HttpRequestSpec extends TestSuite {
         HttpRequest(s"$SERVER_URL/body")
           .post(MultiPartBody(
             "name" -> PlainTextBody("John"),
-            "skills" -> JSONObject(
-              "programming" -> JSONObject(
-                "C" -> 3,
-                "PHP" -> 1,
-                "Scala" -> 5
-              ),
-              "design" -> 2
-            ),
+            "skills" -> JObject(Map(
+              "programming" -> JObject(Map(
+                "C" -> JNumber(3),
+                "PHP" -> JNumber(1),
+                "Scala" -> JNumber(5)
+              )),
+              "design" -> JNumber(2)
+            )),
             "picture" -> StreamBody(ByteBuffer.wrap(IMAGE_BYTES), "image/jpeg")
           ))
       }
@@ -524,11 +524,11 @@ object HttpRequestSpec extends TestSuite {
       }
 
       "can be POSTed as json" - {
-        val part = JSONObject(
-          "foo" -> 42,
-          "engine" -> "Heizölrückstoßabdämpfung",
-          "\"quoted'" -> "Has \" quotes"
-        )
+        val part = JObject(Map(
+          "foo" -> JNumber(42),
+          "engine" -> JString("Heizölrückstoßabdämpfung"),
+          "\"quoted'" -> JString("Has \" quotes")
+        ))
 
         HttpRequest(s"$SERVER_URL/body")
           .post(part)