diff --git a/numcpus_linux.go b/numcpus_linux.go
index 4db7707..7e75cb0 100644
--- a/numcpus_linux.go
+++ b/numcpus_linux.go
@@ -15,7 +15,6 @@
 package numcpus
 
 import (
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strconv"
@@ -35,7 +34,7 @@ func getFromCPUAffinity() (int, error) {
 }
 
 func readCPURange(file string) (int, error) {
-	buf, err := ioutil.ReadFile(filepath.Join(sysfsCPUBasePath, file))
+	buf, err := os.ReadFile(filepath.Join(sysfsCPUBasePath, file))
 	if err != nil {
 		return 0, err
 	}
@@ -89,7 +88,7 @@ func getConfigured() (int, error) {
 }
 
 func getKernelMax() (int, error) {
-	buf, err := ioutil.ReadFile(filepath.Join(sysfsCPUBasePath, "kernel_max"))
+	buf, err := os.ReadFile(filepath.Join(sysfsCPUBasePath, "kernel_max"))
 	if err != nil {
 		return 0, err
 	}