diff --git a/cmd/btcctl/config.go b/cmd/btcctl/config.go
index f6ca8846..44d28c60 100644
--- a/cmd/btcctl/config.go
+++ b/cmd/btcctl/config.go
@@ -6,7 +6,7 @@ package main
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net"
 	"os"
 	"path/filepath"
@@ -322,7 +322,7 @@ func createDefaultConfigFile(destinationPath, serverConfigPath string) error {
 		return err
 	}
 	defer serverConfigFile.Close()
-	content, err := ioutil.ReadAll(serverConfigFile)
+	content, err := io.ReadAll(serverConfigFile)
 	if err != nil {
 		return err
 	}
diff --git a/rpcclient/infrastructure.go b/rpcclient/infrastructure.go
index 9a9c2bb8..f26d2c56 100644
--- a/rpcclient/infrastructure.go
+++ b/rpcclient/infrastructure.go
@@ -15,7 +15,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"math"
 	"net"
 	"net/http"
@@ -852,7 +851,7 @@ func (c *Client) handleSendPostMessage(jReq *jsonRequest) {
 	}
 
 	// Read the raw bytes and close the response.
-	respBytes, err := ioutil.ReadAll(httpResponse.Body)
+	respBytes, err := io.ReadAll(httpResponse.Body)
 	httpResponse.Body.Close()
 	if err != nil {
 		err = fmt.Errorf("error reading json reply: %v", err)
diff --git a/rpcserver.go b/rpcserver.go
index 363661d7..e9fec435 100644
--- a/rpcserver.go
+++ b/rpcserver.go
@@ -15,7 +15,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"math/big"
 	"math/rand"
 	"net"
@@ -4335,7 +4334,7 @@ func (s *rpcServer) jsonRPCRead(w http.ResponseWriter, r *http.Request, isAdmin
 	}
 
 	// Read and close the JSON-RPC request body from the caller.
-	body, err := ioutil.ReadAll(r.Body)
+	body, err := io.ReadAll(r.Body)
 	r.Body.Close()
 	if err != nil {
 		errCode := http.StatusBadRequest
diff --git a/wire/bench_test.go b/wire/bench_test.go
index 2f63fa30..266aded2 100644
--- a/wire/bench_test.go
+++ b/wire/bench_test.go
@@ -9,7 +9,6 @@ import (
 	"compress/bzip2"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net"
 	"os"
 	"testing"
@@ -592,7 +591,7 @@ func BenchmarkDeserializeTxLarge(b *testing.B) {
 		b.Fatalf("Failed to read transaction data: %v", err)
 	}
 	defer fi.Close()
-	buf, err := ioutil.ReadAll(bzip2.NewReader(fi))
+	buf, err := io.ReadAll(bzip2.NewReader(fi))
 	if err != nil {
 		b.Fatalf("Failed to read transaction data: %v", err)
 	}
@@ -713,7 +712,7 @@ func BenchmarkSerializeTxLarge(b *testing.B) {
 		b.Fatalf("Failed to read transaction data: %v", err)
 	}
 	defer fi.Close()
-	buf, err := ioutil.ReadAll(bzip2.NewReader(fi))
+	buf, err := io.ReadAll(bzip2.NewReader(fi))
 	if err != nil {
 		b.Fatalf("Failed to read transaction data: %v", err)
 	}