diff --git a/bin/omakub-sub/manual.sh b/bin/omakub-sub/manual.sh
index 2ab592b..08112a9 100644
--- a/bin/omakub-sub/manual.sh
+++ b/bin/omakub-sub/manual.sh
@@ -1,2 +1,2 @@
-xdg-open "https://manual.omakub.org" >/dev/null
+xdg-open "https://manual.omakub.org" &>/dev/null
 source $OMAKUB_PATH/bin/omakub-sub/menu.sh