diff --git a/constants/constants.go b/constants/constants.go
index 1ddd216..56cb06c 100644
--- a/constants/constants.go
+++ b/constants/constants.go
@@ -2,13 +2,14 @@ package constants
 
 import "fmt"
 
-const WORKER_VERSION = "v1"
+const WORKER_VERSION = "v2"
 
 const WORKER_VERSION_HEADER = "morffix-version"
 const SHARED_SECRET_HEADER = "morffix-secret"
 const NAME_HEADER = "morffix-name"
 const UUID_HEADER = "morffix-uuid"
 const HASH_HEADER = "morffix-hash"
+const TASK_ID_HEADER = "morffix-task-id"
 
 const INDEX_TEMPLATE_NAME = "index.tmpl"
 const LIBRARIES_TEMPLATE_NAME = "libraries.tmpl"
@@ -26,6 +27,8 @@ const SORT_ORDER_ASC_PARAM = "order_asc"
 const QUERY_LIMIT_PARAM = "limit"
 const QUERY_PAGE_PARAM = "page"
 
+const TEMP_FILE_EXTENSION = ".morffix"
+
 type TaskType int
 
 const (
diff --git a/task/upload.go b/task/upload.go
index ec988ae..38c0f94 100644
--- a/task/upload.go
+++ b/task/upload.go
@@ -9,6 +9,7 @@ import (
 	"mime/multipart"
 	"net/http"
 	"os"
+	"strconv"
 	"time"
 
 	"git.lastassault.de/speatzle/morffix/config"
@@ -82,6 +83,7 @@ func uploadFile(ctx context.Context, l *slog.Logger, conf config.Config, path st
 	req.Header.Add(constants.UUID_HEADER, uuid.String())
 	req.Header.Add(constants.WORKER_VERSION_HEADER, constants.WORKER_VERSION)
 	req.Header.Add(constants.HASH_HEADER, base64.StdEncoding.EncodeToString(hash))
+	req.Header.Add(constants.TASK_ID_HEADER, strconv.Itoa(t.ID))
 	req.Header.Add("Content-Type", "multipart/form-data; boundary=\""+m.Boundary()+"\"")
 
 	var client = &http.Client{