diff --git a/abra b/abra
index 30a769e..cee566f 100755
--- a/abra
+++ b/abra
@@ -12,7 +12,7 @@ if type direnv 2>&1 > /dev/null && ! direnv status | grep -q 'Found RC allowed t
 fi
 
 sub_help(){
-	echo "Usage: $PROGRAM_NAME <subcommand> [options]"
+	echo "Usage: $PROGRAM_NAME [-a STACK_NAME] <subcommand> [options]"
 	echo ""
 	echo "Subcommands:"
 	echo "    run SERVICE [CMD]                     run a command in the specified service's container"
@@ -93,6 +93,11 @@ sub_logs (){
 		--timestamps
 }
 
+if [ $1 == "-a" ]; then
+	STACK_NAME=$2
+	shift 2
+fi
+
 subcommand=$1
 case $subcommand in
 	"" | "-h" | "--help")