diff --git a/injector.go b/injector.go
index 58778da..efa8279 100644
--- a/injector.go
+++ b/injector.go
@@ -2,18 +2,8 @@ package injector
 
 import (
 	"fmt"
-	"os"
 	"reflect"
 	"strings"
-	"time"
-
-	"github.com/sirupsen/logrus"
-)
-
-const (
-	// Default log format will output [INFO]: 2006-01-02T15:04:05Z07:00 - Log message
-	defaultLogFormat       = "[%lvl%]: %time% - %msg%"
-	defaultTimestampFormat = time.RFC3339
 )
 
 type Injector interface {
@@ -32,19 +22,6 @@ func NewEngine() *Engine {
 	}
 }
 
-var log *logrus.Logger
-
-func init() {
-	setupLogger()
-}
-
-func setupLogger() {
-	logrus.SetFormatter(&logrus.TextFormatter{})
-	logrus.SetOutput(os.Stdout)
-	logrus.SetLevel(logrus.InfoLevel)
-	log = logrus.StandardLogger()
-}
-
 func (inj *Engine) Register(beans ...interface{}) error {
 	for _, bean := range beans {
 		inj.beans = append(inj.beans, bean)
@@ -54,7 +31,6 @@ func (inj *Engine) Register(beans ...interface{}) error {
 		}
 		structType := val.Type()
 		typeFullName := inj.getTypeFullName(structType)
-		log.Debugf("type full name: %s\n", typeFullName)
 		inj.typeToBean[typeFullName] = bean
 	}
 	return nil
@@ -82,17 +58,14 @@ func (inj *Engine) injectBean(bean interface{}) error {
 	for _, field := range fields {
 		fieldName := field.Name
 		fieldType := field.Type
-		log.Debugf("Name: %s, Type: %s\n", fieldName, fieldType)
 		if fieldType == structType {
-			log.Infof("not supporting self injection")
+			// not supporting self injection
 			continue
 		}
 		childName := inj.getContainingTypeFullName(field)
-		log.Debugf("chile name: %s\n", childName)
 		child := inj.typeToBean[childName]
 		if child == nil {
 			if childName, ok := field.Tag.Lookup("inject"); ok {
-				log.Debugf("chile name: %s\n", childName)
 				child = inj.typeToBean[childName]
 			}
 		}
@@ -100,7 +73,6 @@ func (inj *Engine) injectBean(bean interface{}) error {
 			f := val.FieldByName(fieldName)
 			if f.CanAddr() && f.IsValid() {
 				f.Set(reflect.ValueOf(child))
-				log.Debugf("Injected %s", child)
 			}
 		}
 	}