diff --git a/internal/log/RotatingFileOptions.go b/internal/log/RotatingFileOptions.go
index c9d7422..be7b4c3 100644
--- a/internal/log/RotatingFileOptions.go
+++ b/internal/log/RotatingFileOptions.go
@@ -4,6 +4,14 @@ import "time"
 
 type RotatingFileOption func(*RotatingFile)
 
+func WithTimestampFormat(value string) RotatingFileOption {
+	return func(f *RotatingFile) {
+		if len(value) > 0 {
+			f.format = value
+		}
+	}
+}
+
 func WithMaxSize(value int64) RotatingFileOption {
 	return func(f *RotatingFile) {
 		f.maxSize = value