diff --git a/Gopkg.lock b/Gopkg.lock
index 1a1c421..e6fa468 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -46,8 +46,8 @@
 [[projects]]
   name = "github.com/minio/minio-go"
   packages = [".","pkg/credentials","pkg/encrypt","pkg/policy","pkg/s3signer","pkg/s3utils","pkg/set"]
-  revision = "4e0f567303d4cc90ceb055a451959fb9fc391fb9"
-  version = "3.0.3"
+  revision = "57a8ae886b49af6eb0d2c27c2d007ed2f71e1da5"
+  version = "4.0.3"
 
 [[projects]]
   name = "github.com/pkg/errors"
@@ -88,6 +88,6 @@
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "418c94e2d7594bbe1cca1b2014f3bcdf31271c8b6d3c757c25564619d3eccd0a"
+  inputs-digest = "5ab967c9abb8839deef83bb16468854f4bc3cf22123dbae72157241ccb6eb49a"
   solver-name = "gps-cdcl"
   solver-version = 1
diff --git a/Gopkg.toml b/Gopkg.toml
index 374059e..8e02153 100644
--- a/Gopkg.toml
+++ b/Gopkg.toml
@@ -23,7 +23,7 @@
 
 [[constraint]]
   name = "github.com/gorilla/mux"
-  version = "1.5.0"
+  version = "1.6.0"
 
 [[constraint]]
   branch = "master"
@@ -31,7 +31,7 @@
 
 [[constraint]]
   name = "github.com/minio/minio-go"
-  version = "3.0.3"
+  version = "4.0.3"
 
 [[constraint]]
   name = "github.com/pkg/errors"
diff --git a/create_object.go b/create_object.go
index dd6f279..cae5483 100644
--- a/create_object.go
+++ b/create_object.go
@@ -5,6 +5,7 @@ import (
 	"net/http"
 
 	"github.com/gorilla/mux"
+	minio "github.com/minio/minio-go"
 	"github.com/pkg/errors"
 )
 
@@ -30,7 +31,7 @@ func CreateObjectHandler(s3 S3) http.Handler {
 		}()
 
 		bucketName := mux.Vars(r)["bucketName"]
-		_, err = s3.PutObject(bucketName, handler.Filename, file, contentTypeOctetStream)
+		_, err = s3.PutObject(bucketName, handler.Filename, file, 1, minio.PutObjectOptions{ContentType: contentTypeOctetStream})
 		if err != nil {
 			handleHTTPError(w, errors.Wrap(err, "error putting object"))
 			return
diff --git a/get_object.go b/get_object.go
index 95a7539..d59f346 100644
--- a/get_object.go
+++ b/get_object.go
@@ -6,6 +6,7 @@ import (
 	"net/http"
 
 	"github.com/gorilla/mux"
+	minio "github.com/minio/minio-go"
 	"github.com/pkg/errors"
 )
 
@@ -16,7 +17,7 @@ func GetObjectHandler(s3 S3) http.Handler {
 		bucketName := vars["bucketName"]
 		objectName := vars["objectName"]
 
-		object, err := s3.GetObject(bucketName, objectName)
+		object, err := s3.GetObject(bucketName, objectName, minio.GetObjectOptions{})
 		if err != nil {
 			handleHTTPError(w, errors.Wrap(err, "error getting object"))
 			return
diff --git a/s3.go b/s3.go
index ccffcab..d0588e2 100644
--- a/s3.go
+++ b/s3.go
@@ -9,11 +9,11 @@ import (
 // S3 is a client to interact with S3 storage.
 type S3 interface {
 	CopyObject(minio.DestinationInfo, minio.SourceInfo) error
-	GetObject(string, string) (*minio.Object, error)
+	GetObject(string, string, minio.GetObjectOptions) (*minio.Object, error)
 	ListBuckets() ([]minio.BucketInfo, error)
 	ListObjectsV2(string, string, bool, <-chan struct{}) <-chan minio.ObjectInfo
 	MakeBucket(string, string) error
-	PutObject(string, string, io.Reader, string) (int64, error)
+	PutObject(string, string, io.Reader, int64, minio.PutObjectOptions) (int64, error)
 	RemoveBucket(string) error
 	RemoveObject(string, string) error
 }
diff --git a/s3_test.go b/s3_test.go
index 8cca192..442a09a 100644
--- a/s3_test.go
+++ b/s3_test.go
@@ -20,7 +20,7 @@ func (s *s3Mock) CopyObject(minio.DestinationInfo, minio.SourceInfo) error {
 }
 
 // GetObject mocks minio.Client.GetObject.
-func (s *s3Mock) GetObject(bucketName string, objectName string) (*minio.Object, error) {
+func (s *s3Mock) GetObject(bucketName string, objectName string, opts minio.GetObjectOptions) (*minio.Object, error) {
 	if s.Err != nil {
 		return nil, s.Err
 	}
@@ -73,7 +73,7 @@ func (s *s3Mock) MakeBucket(string, string) error {
 }
 
 // PutObject mocks minio.Client.PutObject.
-func (s *s3Mock) PutObject(string, string, io.Reader, string) (int64, error) {
+func (s *s3Mock) PutObject(string, string, io.Reader, int64, minio.PutObjectOptions) (int64, error) {
 	return 0, s.Err
 }