1 files changed, 7 insertions, 0 deletions
diff --git a/maandree-dl b/maandree-dl
index 029adde..58a9723 100755
--- a/maandree-dl
+++ b/maandree-dl
@@ -95,11 +95,18 @@ checkhash () {
 
 signature_key="$(printf '%s\n' "${signature_key}" | tr -d ' ')"
 
+if test $# -lt 1 || test $# -gt 2; then
+	printf 'usage: %s package [version]\n' "$0" >&2
+	exit 1
+fi
+
 set -v
 
 package="$1"
 version="$2"
 
+test -n "$package"
+
 if test -z "$version"; then
 	version=latest
 fi