diff --git a/formatter_json.go b/formatter_json.go
index 6416d48..9ab2a13 100644
--- a/formatter_json.go
+++ b/formatter_json.go
@@ -24,7 +24,7 @@ import (
 type FormatterJSON struct {
 	FlatContent bool
 	TimeFormat  string
-	data        map[string]interface{}
+	data        map[string]any
 }
 
 func NewFormatterJSON() *FormatterJSON {
@@ -35,7 +35,7 @@ func NewFormatterJSON() *FormatterJSON {
 
 func (formatter *FormatterJSON) Begin(entry *Entry) {
 	// reset formatter
-	formatter.data = make(map[string]interface{})
+	formatter.data = make(map[string]any)
 
 	// add timestamp
 	formatter.data["time"] = entry.Time.Format(formatter.TimeFormat)