diff --git a/core/core.go b/core/core.go
index afa20d0..513c84c 100644
--- a/core/core.go
+++ b/core/core.go
@@ -15,7 +15,7 @@ package core
 import (
 	"encoding/json"
 	"fmt"
-	"io"
+	"io/ioutil"
 	"os"
 	"path/filepath"
 	"sync"
@@ -37,7 +37,7 @@ func Init(dataPath string) error {
 		fi, err := f.Stat()
 		if err == nil && fi.Size() > 0 {
 			// File is not empty
-			jsonBytes, err := io.ReadAll(f)
+			jsonBytes, err := ioutil.ReadAll(f)
 			f.Close()
 			if err != nil {
 				return fmt.Errorf("read comitium.json error: %w", err)
@@ -72,7 +72,7 @@ func (d *FullData) WriteJSON(dataPath string) error {
 	if err != nil {
 		return err
 	}
-	err = os.WriteFile(path, jsonBytes, 0666)
+	err = ioutil.WriteFile(path, jsonBytes, 0666)
 	if err != nil {
 		return err
 	}
diff --git a/core/entries.go b/core/entries.go
index 223ecb9..8beee91 100644
--- a/core/entries.go
+++ b/core/entries.go
@@ -12,6 +12,7 @@ package core
 
 import (
 	"fmt"
+	"io/ioutil"
 	"os"
 	"path/filepath"
 	"sort"
@@ -116,7 +117,7 @@ Watching these pages for any changes that occur.
 => https://git.nytpu.com/comitium/about/ aggregated using comitium
 `
 
-	err := os.WriteFile(path, []byte(rawPage), 0666)
+	err := ioutil.WriteFile(path, []byte(rawPage), 0666)
 	if err != nil {
 		return err
 	}
@@ -161,7 +162,7 @@ func (d *FullData) WriteFeed(dataPath string) error {
 => https://git.nytpu.com/comitium/about/ aggregated using comitium
 `
 
-	err := os.WriteFile(path, []byte(rawPage), 0666)
+	err := ioutil.WriteFile(path, []byte(rawPage), 0666)
 	if err != nil {
 		return err
 	}