diff --git a/incus-osd/api/images/update.go b/incus-osd/api/images/update.go
index c637721..a118284 100644
--- a/incus-osd/api/images/update.go
+++ b/incus-osd/api/images/update.go
@@ -15,7 +15,7 @@ type UpdateFull struct {
 type Update struct {
 	Format string `json:"format"`
 
-	Channel     string         `json:"channel"`
+	Channels    []string       `json:"channel"`
 	Files       []UpdateFile   `json:"files"`
 	Origin      string         `json:"origin"`
 	PublishedAt time.Time      `json:"published_at"`
diff --git a/incus-osd/cmd/image-publisher/main.go b/incus-osd/cmd/image-publisher/main.go
index 29afc5f..ab8aab1 100644
--- a/incus-osd/cmd/image-publisher/main.go
+++ b/incus-osd/cmd/image-publisher/main.go
@@ -83,7 +83,7 @@ func do(ctx context.Context) error {
 	metaUpdate := apiupdate.Update{
 		Format: "1.0",
 
-		Channel:     updateChannel,
+		Channels:    []string{updateChannel},
 		Files:       []apiupdate.UpdateFile{},
 		Origin:      updateOrigin,
 		PublishedAt: time.Now(),