diff --git a/le b/le
index 42d10fd..fc08e1e 100755
--- a/le
+++ b/le
@@ -42,6 +42,18 @@ gen_renew_config() {
 	printf ')\n'
 }
 
+usage() {
+	while read -r line; do printf '%s\n' "$line"; done <<- EOF
+		Usage: le [options] <-d domain> [-d domain] ...
+		   Options:
+		      -c <dir>        # Configuration directory. Default: \$HOME/.acme
+		      -a <dir>        # A dir to put challenges in. Default: /tmp/acme/challenges
+		      -d <domain>     # Domain to issue the certificate for.
+		                      # Can be specified multiple time for multi-domain certs.
+		      -h              # Show this message.
+	EOF
+}
+
 main() {
 	declare cfg_dir
 	declare -a domains
@@ -60,6 +72,10 @@ main() {
 				domains+=( "$2" )
 				shift;;
 
+			-h)
+				usage
+				return 0;;
+
 			--)
 				shift
 				break;;
diff --git a/le-renew b/le-renew
index e43a6f5..8ccf9b5 100755
--- a/le-renew
+++ b/le-renew
@@ -16,6 +16,17 @@ set_default() {
 	fi
 }
 
+usage() {
+	while read -r line; do printf '%s\n' "$line"; done <<- EOF
+		Usage: le [options] <-d domain> [-d domain] ...
+		   Options:
+		      -c <dir>        # Configuration directory. Default: \$HOME/.acme
+		      -t <sec>        # How many seconds till exipration to consider as soon. Default: 259200 (3 days)
+		                      # Can be specified multiple time for multi-domain certs.
+		      -h              # Show this message.
+	EOF
+}
+
 main() {
 	declare cfg_dir
 	declare -a domains le_args
@@ -30,9 +41,9 @@ main() {
 				checkend_seconds=$2
 				shift;;
 
-			-d)
-				domains+=( "$2" )
-				shift;;
+			-h)
+				usage
+				return 0;;
 
 			--)
 				shift