diff --git a/go/vendor/github.com/asaskevich/govalidator/converter.go b/go/vendor/github.com/asaskevich/govalidator/converter.go
new file mode 100644
index 0000000..cf1e5d5
--- /dev/null
+++ b/go/vendor/github.com/asaskevich/govalidator/converter.go
@@ -0,0 +1,64 @@
+package govalidator
+
+import (
+	"encoding/json"
+	"fmt"
+	"reflect"
+	"strconv"
+)
+
+// ToString convert the input to a string.
+func ToString(obj interface{}) string {
+	res := fmt.Sprintf("%v", obj)
+	return string(res)
+}
+
+// ToJSON convert the input to a valid JSON string
+func ToJSON(obj interface{}) (string, error) {
+	res, err := json.Marshal(obj)
+	if err != nil {
+		res = []byte("")
+	}
+	return string(res), err
+}
+
+// ToFloat convert the input string to a float, or 0.0 if the input is not a float.
+func ToFloat(str string) (float64, error) {
+	res, err := strconv.ParseFloat(str, 64)
+	if err != nil {
+		res = 0.0
+	}
+	return res, err
+}
+
+// ToInt convert the input string or any int type to an integer type 64, or 0 if the input is not an integer.
+func ToInt(value interface{}) (res int64, err error) {
+	val := reflect.ValueOf(value)
+
+	switch value.(type) {
+	case int, int8, int16, int32, int64:
+		res = val.Int()
+	case uint, uint8, uint16, uint32, uint64:
+		res = int64(val.Uint())
+	case string:
+		if IsInt(val.String()) {
+			res, err = strconv.ParseInt(val.String(), 0, 64)
+			if err != nil {
+				res = 0
+			}
+		} else {
+			err = fmt.Errorf("math: square root of negative number %g", value)
+			res = 0
+		}
+	default:
+		err = fmt.Errorf("math: square root of negative number %g", value)
+		res = 0
+	}
+
+	return
+}
+
+// ToBoolean convert the input string to a boolean.
+func ToBoolean(str string) (bool, error) {
+	return strconv.ParseBool(str)
+}