diff --git a/cmd/git-sync/webhook.go b/cmd/git-sync/webhook.go
index e3d8a2c..516be14 100644
--- a/cmd/git-sync/webhook.go
+++ b/cmd/git-sync/webhook.go
@@ -28,7 +28,7 @@ type webhookRepoInfo struct {
 
 func (w *Webhook) Do(info webhookRepoInfo) error {
 	req, err := http.NewRequest(w.Method, w.URL, nil)
-	req.Header.Set("Git-Sync-Hash", info.Hash)
+	req.Header.Set("Gitsync-Hash", info.Hash)
 	if err != nil {
 		return err
 	}