diff --git a/cmd/peggo/util.go b/cmd/peggo/util.go
index d6df7c36..558bca2f 100644
--- a/cmd/peggo/util.go
+++ b/cmd/peggo/util.go
@@ -5,7 +5,6 @@ import (
 	"bytes"
 	"encoding/hex"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"strings"
 	"time"
@@ -18,7 +17,7 @@ import (
 // readEnv is a special utility that reads `.env` file into actual environment variables
 // of the current app, similar to `dotenv` Node package.
 func readEnv() {
-	if envdata, _ := ioutil.ReadFile(".env"); len(envdata) > 0 {
+	if envdata, _ := os.ReadFile(".env"); len(envdata) > 0 {
 		s := bufio.NewScanner(bytes.NewReader(envdata))
 		for s.Scan() {
 			parts := strings.Split(s.Text(), "=")
diff --git a/peggo/orchestrator/ethereum/keystore/keycache.go b/peggo/orchestrator/ethereum/keystore/keycache.go
index b3604da5..993743ef 100644
--- a/peggo/orchestrator/ethereum/keystore/keycache.go
+++ b/peggo/orchestrator/ethereum/keystore/keycache.go
@@ -3,8 +3,8 @@ package keystore
 import (
 	"crypto/ecdsa"
 	"crypto/sha1"
-	"io/ioutil"
 	"math/big"
+	"os"
 	"strings"
 	"sync"
 
@@ -87,7 +87,7 @@ func (k *keyCache) PrivateKey(account common.Address, password string) (*ecdsa.P
 		path = strings.TrimPrefix(path, "keystore://")
 	}
 
-	keyJSON, err := ioutil.ReadFile(path)
+	keyJSON, err := os.ReadFile(path)
 	if err != nil {
 		err = errors.Wrap(err, "failed to load a file from keystore")
 		return nil, err
diff --git a/peggo/orchestrator/ethereum/keystore/keystore.go b/peggo/orchestrator/ethereum/keystore/keystore.go
index de312dae..34557c8b 100644
--- a/peggo/orchestrator/ethereum/keystore/keystore.go
+++ b/peggo/orchestrator/ethereum/keystore/keystore.go
@@ -5,7 +5,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"sort"
@@ -98,7 +97,7 @@ func (ks *keyStore) forEachWallet(keystorePath string, fn func(spec *WalletSpec)
 			return filepath.SkipDir
 		}
 		var spec *WalletSpec
-		if data, err := ioutil.ReadFile(path); err != nil {
+		if data, err := os.ReadFile(path); err != nil {
 			return err
 		} else if err = json.Unmarshal(data, &spec); err != nil {
 			return err
diff --git a/peggo/orchestrator/pricefeed/coingecko.go b/peggo/orchestrator/pricefeed/coingecko.go
index 2139978b..d4a929a3 100644
--- a/peggo/orchestrator/pricefeed/coingecko.go
+++ b/peggo/orchestrator/pricefeed/coingecko.go
@@ -3,7 +3,6 @@ package pricefeed
 import (
 	"encoding/json"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/url"
 	"path"
@@ -104,7 +103,7 @@ func (cp *CoingeckoPriceFeed) QueryUSDPrice(erc20Contract common.Address) (float
 		return zeroPrice, errors.Wrapf(err, "failed to fetch price from %s", reqURL)
 	}
 
-	respBody, err := ioutil.ReadAll(io.LimitReader(resp.Body, maxRespBytes))
+	respBody, err := io.ReadAll(io.LimitReader(resp.Body, maxRespBytes))
 	if err != nil {
 		_ = resp.Body.Close()
 		metrics.ReportFuncError(cp.svcTags)
diff --git a/peggo/test/peggo/constants.go b/peggo/test/peggo/constants.go
index 7c0c7029..187c0041 100644
--- a/peggo/test/peggo/constants.go
+++ b/peggo/test/peggo/constants.go
@@ -4,7 +4,6 @@ import (
 	"bufio"
 	"bytes"
 	"crypto/ecdsa"
-	"io/ioutil"
 	"os"
 	"strconv"
 	"strings"
@@ -88,7 +87,7 @@ func init() {
 // readEnv is a special utility that reads `.env` file into actual environment variables
 // of the current app, similar to `dotenv` Node package.
 func readEnv() {
-	if envdata, _ := ioutil.ReadFile(".env"); len(envdata) > 0 {
+	if envdata, _ := os.ReadFile(".env"); len(envdata) > 0 {
 		s := bufio.NewScanner(bytes.NewReader(envdata))
 		for s.Scan() {
 			parts := strings.Split(s.Text(), "=")