diff --git a/.local/bin/opout b/.local/bin/opout
index 8890861..d2b447a 100755
--- a/.local/bin/opout
+++ b/.local/bin/opout
@@ -7,7 +7,7 @@
 basename="${1%.*}"
 
 case "${*}" in
-	*.tex|*.m[dse]|*.[rR]md|*.mom|*.[0-9]) target="$(getcomproot "$1" || echo "$1")" ; setsid -f xdg-open "${target%.*}".pdf >/dev/null 2>&1 ;;
+	*.tex|*.sil|*.m[dse]|*.[rR]md|*.mom|*.[0-9]) target="$(getcomproot "$1" || echo "$1")" ; setsid -f xdg-open "${target%.*}".pdf >/dev/null 2>&1 ;;
 	*.html) setsid -f "$BROWSER" "$basename".html >/dev/null 2>&1 ;;
 	*.sent) setsid -f sent "$1" >/dev/null 2>&1 ;;
 esac