diff --git a/cmd/convert.go b/cmd/convert.go
index b36c86a..ea480d7 100644
--- a/cmd/convert.go
+++ b/cmd/convert.go
@@ -10,6 +10,7 @@ import (
 	"os"
 	"path/filepath"
 	"regexp"
+	"slices"
 
 	"github.com/spf13/cobra"
 	"github.com/yookoala/realpath"
@@ -119,6 +120,7 @@ var loadEnvironmentValues string = ""
 
 var reposFromHelmChart []helmfileRepository
 var environmentValues map[string]interface{}
+var filesWrittenTo []string
 
 // convertCmd represents the convert command
 var convertCmd = &cobra.Command{
@@ -301,7 +303,14 @@ func outputString(data string, filename string) {
 	if string(outputDir)  == "-" {
 		fmt.Println(data)
 	} else {
-		f, err := os.OpenFile(outputDir+string(os.PathSeparator)+filename, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
+		var mode int
+		if slices.Contains(filesWrittenTo,filename) {
+			mode = os.O_APPEND|os.O_CREATE|os.O_WRONLY
+		} else {
+			filesWrittenTo = append(filesWrittenTo, filename)
+			mode = os.O_TRUNC|os.O_CREATE|os.O_WRONLY
+		}
+		f, err := os.OpenFile(outputDir+string(os.PathSeparator)+filename, mode, 0644)
 		if err != nil {
 			panic(err)
 		}