diff --git a/pkg/stdlib/io/net/http/delete.go b/pkg/stdlib/io/net/http/delete.go
index aa238293..6d5489de 100644
--- a/pkg/stdlib/io/net/http/delete.go
+++ b/pkg/stdlib/io/net/http/delete.go
@@ -7,7 +7,7 @@ import (
 	"github.com/MontFerret/ferret/pkg/runtime/core"
 )
 
-// DELETE makes a HTTP DELETE request.
+// DELETE makes a DELETE request.
 // @param {Object} params - Request parameters.
 // @param {String} params.url - Target url
 // @param {Binary} params.body - Request data
diff --git a/pkg/stdlib/io/net/http/get.go b/pkg/stdlib/io/net/http/get.go
index cf0ef57a..f2e051cc 100644
--- a/pkg/stdlib/io/net/http/get.go
+++ b/pkg/stdlib/io/net/http/get.go
@@ -9,7 +9,7 @@ import (
 	"github.com/MontFerret/ferret/pkg/runtime/values/types"
 )
 
-// GET makes a HTTP GET request.
+// GET makes a GET request.
 // @param {Object | String} urlOrParam - Target url or parameters.
 // @param {String} [param.url] - Target url or parameters.
 // @param {Object} [param.headers] - HTTP headers
diff --git a/pkg/stdlib/io/net/http/post.go b/pkg/stdlib/io/net/http/post.go
index 9b4f0a6b..3fa02ef2 100644
--- a/pkg/stdlib/io/net/http/post.go
+++ b/pkg/stdlib/io/net/http/post.go
@@ -10,7 +10,7 @@ import (
 // POST makes a POST request.
 // @param {Object} params - Request parameters.
 // @param {String} params.url - Target url
-// @param {Binary} params.body - Request data
+// @param {Any} params.body - Request data
 // @param {Object} [params.headers] - HTTP headers
 // @return {Binary} - Response in binary format
 func POST(ctx context.Context, args ...core.Value) (core.Value, error) {
diff --git a/pkg/stdlib/io/net/http/post_test.go b/pkg/stdlib/io/net/http/post_test.go
index 99c2be61..1de06bcf 100644
--- a/pkg/stdlib/io/net/http/post_test.go
+++ b/pkg/stdlib/io/net/http/post_test.go
@@ -16,7 +16,7 @@ import (
 )
 
 func TestPOST(t *testing.T) {
-	SkipConvey("Should successfully make request", t, func() {
+	Convey("Should successfully make request", t, func() {
 		type User struct {
 			FirstName string `json:"first_name"`
 			LastName  string `json:"last_name"`
@@ -98,4 +98,85 @@ func TestPOST(t *testing.T) {
 		So(out.Type().ID(), ShouldEqual, types.Binary.ID())
 		So(out.String(), ShouldEqual, "OK")
 	})
+
+	Convey("Should successfully make request with auto-marshalling to JSON", t, func() {
+		type User struct {
+			FirstName string `json:"first_name"`
+			LastName  string `json:"last_name"`
+		}
+
+		port := randPort()
+
+		server := &h.Server{
+			Addr: port,
+			Handler: h.HandlerFunc(func(w h.ResponseWriter, r *h.Request) {
+				var err error
+
+				defer func() {
+					if err != nil {
+						w.Write([]byte(err.Error()))
+					} else {
+						w.Write([]byte("OK"))
+					}
+				}()
+
+				if r.Method != "POST" {
+					err = errors.Errorf("Expected method to be POST, but got %s", r.Method)
+
+					return
+				}
+
+				data, err := ioutil.ReadAll(r.Body)
+
+				if err != nil {
+					return
+				}
+
+				user := User{}
+
+				err = json.Unmarshal(data, &user)
+
+				if err != nil {
+					return
+				}
+
+				if user.FirstName != "Rob" {
+					err = errors.Errorf("Expected FirstName to be Rob, but got %s", user.FirstName)
+
+					return
+				}
+
+				if user.LastName != "Pike" {
+					err = errors.Errorf("Expected LastName to be Pike, but got %s", user.LastName)
+
+					return
+				}
+			}),
+		}
+
+		ctx, cancel := context.WithCancel(context.Background())
+
+		go func() {
+			server.ListenAndServe()
+		}()
+
+		defer func() {
+			cancel()
+			server.Shutdown(ctx)
+		}()
+
+		j := values.NewObjectWith(
+			values.NewObjectProperty("first_name", values.NewString("Rob")),
+			values.NewObjectProperty("last_name", values.NewString("Pike")),
+		)
+
+		out, err := http.POST(ctx, values.NewObjectWith(
+			values.NewObjectProperty("url", values.NewString("http://127.0.0.1"+port)),
+			values.NewObjectProperty("body", j),
+		))
+
+		So(err, ShouldBeNil)
+		So(out.Type().ID(), ShouldEqual, types.Binary.ID())
+		So(out.String(), ShouldEqual, "OK")
+	})
 }
diff --git a/pkg/stdlib/io/net/http/put.go b/pkg/stdlib/io/net/http/put.go
index 224cd567..e8a398a6 100644
--- a/pkg/stdlib/io/net/http/put.go
+++ b/pkg/stdlib/io/net/http/put.go
@@ -10,7 +10,7 @@ import (
 // PUT makes a PUT HTTP request.
 // @param {Object} params - Request parameters.
 // @param {String} params.url - Target url
-// @param {Binary} params.body - Request data
+// @param {Any} params.body - Request data
 // @param {Object} [params.headers] - HTTP headers
 // @return {Binary} - Response in binary format
 func PUT(ctx context.Context, args ...core.Value) (core.Value, error) {
diff --git a/pkg/stdlib/io/net/http/request.go b/pkg/stdlib/io/net/http/request.go
index 7abd0026..fd184aa9 100644
--- a/pkg/stdlib/io/net/http/request.go
+++ b/pkg/stdlib/io/net/http/request.go
@@ -118,11 +118,23 @@ func newParamsFrom(obj *values.Object) (Params, error) {
 	body, exists := obj.Get("body")
 
 	if exists {
-		if err := core.ValidateType(body, types.Binary); err != nil {
-			return Params{}, core.Error(err, ".body")
-		}
+		if core.IsTypeOf(body, types.Binary) {
+			p.Body = body.(values.Binary)
+		} else {
+			j, err := body.MarshalJSON()
+
+			if err != nil {
+				return Params{}, core.Error(err, ".body")
+			}
+
+			p.Body = values.NewBinary(j)
 
-		p.Body = body.(values.Binary)
+			if p.Headers == nil {
+				p.Headers = values.NewObject()
+			}
+
+			p.Headers.Set("Content-Type", values.NewString("application/json"))
+		}
 	}
 
 	return p, nil