diff --git a/cmd/generate.go b/cmd/generate.go
index 001c2ef..81f1353 100644
--- a/cmd/generate.go
+++ b/cmd/generate.go
@@ -34,7 +34,7 @@ var generateFlags = []cli.Flag{
 		Name:    rootFlag,
 		Aliases: []string{"r"},
 		Usage:   "The name of the root object or array",
-		Value:   "Root",
+		Value:   gen.DefaultRootName,
 	},
 	&cli.StringFlag{
 		Name:    packageFlag,
diff --git a/gen/constants.go b/gen/constants.go
index e38dc29..b84a40f 100644
--- a/gen/constants.go
+++ b/gen/constants.go
@@ -5,3 +5,6 @@ const DefaultOutputFile = "types.go"
 
 // DefaultPackage is the name of the default package
 const DefaultPackage = "main"
+
+// DefaultRootName is the default name of the top-level JSON object
+const DefaultRootName = "Root"
diff --git a/gen/gen.go b/gen/gen.go
index fbe5097..5315782 100644
--- a/gen/gen.go
+++ b/gen/gen.go
@@ -3,6 +3,7 @@ package gen
 import (
 	"encoding/json"
 	"errors"
+	"io"
 	"io/ioutil"
 	"log"
 	"os"
@@ -69,6 +70,12 @@ func (g *Gen) SetBytes(bytes []byte) *Gen {
 	return g
 }
 
+// ReadBytes allows for the explicit setting of raw bytes via io.Reader
+func (g *Gen) ReadBytes(r io.Reader) *Gen {
+	g.bytes, _ = ioutil.ReadAll(r)
+	return g
+}
+
 // SetJSON allows for the explicit setting of provided JSON payload
 // TODO: Needs further testing before ready for external usage.
 func (g *Gen) setJSON(json interface{}) *Gen {