diff --git a/webcontroller/file_viewer.go b/webcontroller/file_viewer.go
index 83cd880..fd8663b 100644
--- a/webcontroller/file_viewer.go
+++ b/webcontroller/file_viewer.go
@@ -80,14 +80,14 @@ func (vd *viewerData) adType(files []pixelapi.ListFile) {
 	// Intn returns a number up to n, but never n itself. So to get a random 0
 	// or 1 we need to give it n=2. We can use this function to make other
 	// splits like 1/3 1/4, etc
-	switch i := rand.Intn(8); i {
+	switch i := rand.Intn(10); i {
 	case 0:
 		vd.AdBannerType = brave
 	case 1:
 		vd.AdBannerType = aAds
-	case 2, 3, 4:
+	case 2, 3:
 		vd.AdBannerType = adsPlus
-	case 5, 6, 7:
+	case 4, 5, 6, 7, 8, 9:
 		vd.AdBannerType = pixFuture
 	default:
 		panic(fmt.Errorf("random number generator returned unrecognised number: %d", i))