diff --git a/api-notification.go b/api-notification.go
index 57ac1ed37..8514461d7 100644
--- a/api-notification.go
+++ b/api-notification.go
@@ -20,11 +20,11 @@ package minio
 import (
 	"bufio"
 	"context"
-	"encoding/json"
 	"net/http"
 	"net/url"
 	"time"
 
+	jsoniter "github.com/json-iterator/go"
 	"github.com/minio/minio-go/v6/pkg/s3utils"
 )
 
@@ -203,6 +203,7 @@ func (c Client) ListenBucketNotification(bucketName, prefix, suffix string, even
 			// Use a higher buffer to support unexpected
 			// caching done by proxies
 			bio.Buffer(notificationEventBuffer, notificationCapacity)
+			var json = jsoniter.ConfigCompatibleWithStandardLibrary
 
 			// Unmarshal each line, returns marshalled values.
 			for bio.Scan() {
diff --git a/functional_tests.go b/functional_tests.go
index ca66bc6fd..bd7683c18 100644
--- a/functional_tests.go
+++ b/functional_tests.go
@@ -22,7 +22,6 @@ package main
 import (
 	"bytes"
 	"context"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
@@ -40,6 +39,7 @@ import (
 	"time"
 
 	"github.com/dustin/go-humanize"
+	jsoniter "github.com/json-iterator/go"
 	log "github.com/sirupsen/logrus"
 
 	"github.com/minio/minio-go/v6"
@@ -75,7 +75,7 @@ func (f *mintJSONFormatter) Format(entry *log.Entry) ([]byte, error) {
 			data[k] = v
 		}
 	}
-
+	var json = jsoniter.ConfigCompatibleWithStandardLibrary
 	serialized, err := json.Marshal(data)
 	if err != nil {
 		return nil, fmt.Errorf("Failed to marshal fields to JSON, %v", err)
diff --git a/go.mod b/go.mod
index fe6d38bc6..fe43a735e 100644
--- a/go.mod
+++ b/go.mod
@@ -4,6 +4,7 @@ go 1.12
 
 require (
 	github.com/dustin/go-humanize v1.0.0 // indirect
+	github.com/json-iterator/go v1.1.9
 	github.com/minio/sha256-simd v0.1.1
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/sirupsen/logrus v1.5.0 // indirect
diff --git a/go.sum b/go.sum
index 57de3a2b9..7461ddbf1 100644
--- a/go.sum
+++ b/go.sum
@@ -1,8 +1,13 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dustin/go-humanize v1.0.0 h1:VSnTsYCnlFHaM2/igO1h6X3HA71jcobQuxemgkq4zYo=
 github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
+github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1 h1:EGx4pi6eqNxGaHF6qqu48+N2wcFQ5qg5FXgOdqsJ5d8=
 github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
+github.com/json-iterator/go v1.1.9 h1:9yzud/Ht36ygwatGx56VwCZtlI/2AD15T1X2sjSuGns=
+github.com/json-iterator/go v1.1.9/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/jtolds/gls v4.20.0+incompatible h1:xdiiI2gbIgH/gLH7ADydsJ1uDOEzR8yvV7C0MuV77Wo=
 github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
@@ -10,6 +15,11 @@ github.com/minio/sha256-simd v0.1.1 h1:5QHSlgo3nt5yKOJrC7W8w7X+NFl8cMPZm96iu8kKU
 github.com/minio/sha256-simd v0.1.1/go.mod h1:B5e1o+1/KgNmWrSQK08Y6Z1Vb5pwIktudl0J58iy0KM=
 github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
 github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
+github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 h1:ZqeYNhU3OHLH3mGKHDcjJRFFRrJa6eAM5H+CtDdOsPc=
+github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
+github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742 h1:Esafd1046DLDQ0W1YjYsBW+p8U2u7vzgW2SQVmlNazg=
+github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/sirupsen/logrus v1.5.0 h1:1N5EYkVAPEywqZRJd7cwnRtCb6xJx7NH3T3WUTF980Q=
 github.com/sirupsen/logrus v1.5.0/go.mod h1:+F7Ogzej0PZc/94MaYx/nvG9jOFMD2osvC3s+Squfpo=
@@ -17,7 +27,10 @@ github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d h1:zE9ykE
 github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
 github.com/smartystreets/goconvey v0.0.0-20190330032615-68dc04aab96a h1:pa8hGb/2YqsZKovtsgrwcDH1RZhVbTKCjLp47XpqCDs=
 github.com/smartystreets/goconvey v0.0.0-20190330032615-68dc04aab96a/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190513172903-22d7a77e9e5f h1:R423Cnkcp5JABoeemiGEPlt9tHXFfw5kvc0yqlxRPWo=
 golang.org/x/crypto v0.0.0-20190513172903-22d7a77e9e5f/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
diff --git a/pkg/credentials/file_minio_client.go b/pkg/credentials/file_minio_client.go
index 8adb5dcb1..ca6db005b 100644
--- a/pkg/credentials/file_minio_client.go
+++ b/pkg/credentials/file_minio_client.go
@@ -18,12 +18,12 @@
 package credentials
 
 import (
-	"encoding/json"
 	"io/ioutil"
 	"os"
 	"path/filepath"
 	"runtime"
 
+	jsoniter "github.com/json-iterator/go"
 	homedir "github.com/mitchellh/go-homedir"
 )
 
@@ -122,6 +122,8 @@ type config struct {
 // returned if it fails to read from the file.
 func loadAlias(filename, alias string) (hostConfig, error) {
 	cfg := &config{}
+	var json = jsoniter.ConfigCompatibleWithStandardLibrary
+
 	configBytes, err := ioutil.ReadFile(filename)
 	if err != nil {
 		return hostConfig{}, err
diff --git a/pkg/credentials/iam_aws.go b/pkg/credentials/iam_aws.go
index 60f78f808..a7eb8cb9a 100644
--- a/pkg/credentials/iam_aws.go
+++ b/pkg/credentials/iam_aws.go
@@ -19,7 +19,6 @@ package credentials
 
 import (
 	"bufio"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"io/ioutil"
@@ -29,6 +28,8 @@ import (
 	"os"
 	"path"
 	"time"
+
+	jsoniter "github.com/json-iterator/go"
 )
 
 // DefaultExpiryWindow - Default expiry window.
@@ -227,7 +228,7 @@ func getEcsTaskCredentials(client *http.Client, endpoint string) (ec2RoleCredRes
 	}
 
 	respCreds := ec2RoleCredRespBody{}
-	if err := json.NewDecoder(resp.Body).Decode(&respCreds); err != nil {
+	if err := jsoniter.NewDecoder(resp.Body).Decode(&respCreds); err != nil {
 		return ec2RoleCredRespBody{}, err
 	}
 
@@ -283,7 +284,7 @@ func getCredentials(client *http.Client, endpoint string) (ec2RoleCredRespBody,
 	}
 
 	respCreds := ec2RoleCredRespBody{}
-	if err := json.NewDecoder(resp.Body).Decode(&respCreds); err != nil {
+	if err := jsoniter.NewDecoder(resp.Body).Decode(&respCreds); err != nil {
 		return ec2RoleCredRespBody{}, err
 	}
 
diff --git a/pkg/encrypt/server-side.go b/pkg/encrypt/server-side.go
index cabc65067..5276f63fc 100644
--- a/pkg/encrypt/server-side.go
+++ b/pkg/encrypt/server-side.go
@@ -20,10 +20,10 @@ package encrypt
 import (
 	"crypto/md5"
 	"encoding/base64"
-	"encoding/json"
 	"errors"
 	"net/http"
 
+	jsoniter "github.com/json-iterator/go"
 	"golang.org/x/crypto/argon2"
 )
 
@@ -101,6 +101,7 @@ func NewSSEKMS(keyID string, context interface{}) (ServerSide, error) {
 	if context == nil {
 		return kms{key: keyID, hasContext: false}, nil
 	}
+	var json = jsoniter.ConfigCompatibleWithStandardLibrary
 	serializedContext, err := json.Marshal(context)
 	if err != nil {
 		return nil, err
diff --git a/pkg/policy/bucket-policy-condition_test.go b/pkg/policy/bucket-policy-condition_test.go
index 2fc9baa60..db24cf364 100644
--- a/pkg/policy/bucket-policy-condition_test.go
+++ b/pkg/policy/bucket-policy-condition_test.go
@@ -18,12 +18,14 @@
 package policy
 
 import (
-	"encoding/json"
 	"testing"
 
+	jsoniter "github.com/json-iterator/go"
 	"github.com/minio/minio-go/v6/pkg/set"
 )
 
+var json = jsoniter.ConfigCompatibleWithStandardLibrary
+
 // ConditionKeyMap.Add() is called and the result is validated.
 func TestConditionKeyMapAdd(t *testing.T) {
 	condKeyMap := make(ConditionKeyMap)
diff --git a/pkg/policy/bucket-policy.go b/pkg/policy/bucket-policy.go
index f2c728924..f318be2a0 100644
--- a/pkg/policy/bucket-policy.go
+++ b/pkg/policy/bucket-policy.go
@@ -18,11 +18,11 @@
 package policy
 
 import (
-	"encoding/json"
 	"errors"
 	"reflect"
 	"strings"
 
+	jsoniter "github.com/json-iterator/go"
 	"github.com/minio/minio-go/v6/pkg/set"
 )
 
@@ -88,7 +88,8 @@ type User struct {
 // the reason is that Principal can take a json struct represented by
 // User string but it can also take a string.
 func (u *User) UnmarshalJSON(data []byte) error {
-	// Try to unmarshal data in a struct equal to User, we need it
+	// Try to unmarshal data in a struct equal to User,
+	var json = jsoniter.ConfigCompatibleWithStandardLibrary
 	// to avoid infinite recursive call of this function
 	type AliasUser User
 	var au AliasUser
diff --git a/pkg/policy/bucket-policy_test.go b/pkg/policy/bucket-policy_test.go
index a514eaa0f..7d0a9cbfb 100644
--- a/pkg/policy/bucket-policy_test.go
+++ b/pkg/policy/bucket-policy_test.go
@@ -18,7 +18,6 @@
 package policy
 
 import (
-	"encoding/json"
 	"fmt"
 	"reflect"
 	"testing"
diff --git a/pkg/set/stringset.go b/pkg/set/stringset.go
index e220271bb..c35e58e1a 100644
--- a/pkg/set/stringset.go
+++ b/pkg/set/stringset.go
@@ -18,14 +18,17 @@
 package set
 
 import (
-	"encoding/json"
 	"fmt"
 	"sort"
+
+	jsoniter "github.com/json-iterator/go"
 )
 
 // StringSet - uses map as set of strings.
 type StringSet map[string]struct{}
 
+var json = jsoniter.ConfigCompatibleWithStandardLibrary
+
 // ToSlice - returns StringSet as string slice.
 func (set StringSet) ToSlice() []string {
 	keys := make([]string, 0, len(set))