diff --git a/eml_unpack_attachments/go.mod b/eml_unpack_attachments/go.mod
index 9d6b326..83c7390 100644
--- a/eml_unpack_attachments/go.mod
+++ b/eml_unpack_attachments/go.mod
@@ -3,8 +3,12 @@ module github.com/dezeroku/ses_local_email/eml_unpack_attachments
 go 1.23.1
 
 require (
-	github.com/DusanKasan/parsemail v1.2.0
 	github.com/fsnotify/fsnotify v1.7.0
+	github.com/mnako/letters v0.2.2
 )
 
-require golang.org/x/sys v0.4.0 // indirect
+require (
+	golang.org/x/net v0.17.0 // indirect
+	golang.org/x/sys v0.13.0 // indirect
+	golang.org/x/text v0.13.0 // indirect
+)
diff --git a/eml_unpack_attachments/go.sum b/eml_unpack_attachments/go.sum
index 1840c75..7743dd1 100644
--- a/eml_unpack_attachments/go.sum
+++ b/eml_unpack_attachments/go.sum
@@ -1,6 +1,10 @@
-github.com/DusanKasan/parsemail v1.2.0 h1:CrzTL1nuPLxB41aO4zE/Tzc9GVD8jjifUftlbTKQQl4=
-github.com/DusanKasan/parsemail v1.2.0/go.mod h1:B9lfMbpVe4DMqPImAOCGti7KEwasnRTrKKn66iQefVs=
 github.com/fsnotify/fsnotify v1.7.0 h1:8JEhPFa5W2WU7YfeZzPNqzMP6Lwt7L2715Ggo0nosvA=
 github.com/fsnotify/fsnotify v1.7.0/go.mod h1:40Bi/Hjc2AVfZrqy+aj+yEI+/bRxZnMJyTJwOpGvigM=
-golang.org/x/sys v0.4.0 h1:Zr2JFtRQNX3BCZ8YtxRE9hNJYC8J6I1MVbMg6owUp18=
-golang.org/x/sys v0.4.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+github.com/mnako/letters v0.2.2 h1:koVahnzazHIq3aQnjVZE5SBJ7ZG/mXK6uSM4Jh70Naw=
+github.com/mnako/letters v0.2.2/go.mod h1:8DKs/xAQ9A7TP8zrLiZPvlrX5synZnvRyTT5Ja+QUK4=
+golang.org/x/net v0.17.0 h1:pVaXccu2ozPjCXewfr1S7xza/zcXTity9cCdXQYSjIM=
+golang.org/x/net v0.17.0/go.mod h1:NxSsAGuq816PNPmqtQdLE42eU2Fs7NoRIZrHJAlaCOE=
+golang.org/x/sys v0.13.0 h1:Af8nKPmuFypiUBjVoU9V20FiaFXOcuZI21p0ycVYYGE=
+golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/text v0.13.0 h1:ablQoSUd0tRdKxZewP80B+BaqeKJuVhuRxj/dkrun3k=
+golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
diff --git a/eml_unpack_attachments/main.go b/eml_unpack_attachments/main.go
index 7462fed..64a2cb7 100644
--- a/eml_unpack_attachments/main.go
+++ b/eml_unpack_attachments/main.go
@@ -1,15 +1,14 @@
 package main
 
 import (
-	"bytes"
 	"io/ioutil"
 	"log"
 	"os"
 	"path"
 	"strings"
 
-	"github.com/DusanKasan/parsemail"
 	"github.com/fsnotify/fsnotify"
+	"github.com/mnako/letters"
 )
 
 var (
@@ -49,19 +48,18 @@ func processNewFile(filename string, outputDirectory string) error {
 	}
 	defer reader.Close()
 
-	email, err := parsemail.Parse(reader)
+	email, err := letters.ParseEmail(reader)
 	if err != nil {
 		return err
 	}
 
-	log.Printf("FROM: %s TO: %s SUBJECT: %s\n", email.From, email.To, email.Subject)
-	if len(email.Attachments) > 0 {
+	log.Printf("FROM: %s TO: %s SUBJECT: %s\n", email.Headers.From, email.Headers.To, email.Headers.Subject)
+	if len(email.AttachedFiles) > 0 {
 		log.Print("Attachments:")
-		for _, a := range email.Attachments {
-			log.Print(a.Filename)
-			buf := new(bytes.Buffer)
-			buf.ReadFrom(a.Data)
-			err := os.WriteFile(path.Join(outputDirectory, a.Filename), buf.Bytes(), 0644)
+		for _, a := range email.AttachedFiles {
+			attachmentName := a.ContentType.Params["name"]
+			log.Print(attachmentName)
+			err := os.WriteFile(path.Join(outputDirectory, attachmentName), a.Data, 0644)
 			if err != nil {
 				return err
 			}