diff --git a/Makefile b/Makefile
index 497f07c..2cd3f04 100644
--- a/Makefile
+++ b/Makefile
@@ -19,7 +19,7 @@
 	chmod a+x $@
 
 P =	cassh
-V =	1
+V =	2
 
 PREFIX =	/usr/local
 MANPREFIX =	${PREFIX}/man
diff --git a/cassh.sh b/cassh.sh
index f48ee96..c1456c8 100644
--- a/cassh.sh
+++ b/cassh.sh
@@ -19,6 +19,7 @@ Usage:
 	    [-V validity_interval]
 	${0##*/} mkfile authorized_keys [options ...]
 	${0##*/} mkfile known_hosts [hostnames ...]
+	${0##*/} revoke [-qv] file ...
 EOF
 	exit 1
 }
@@ -138,7 +139,8 @@ main_issue()
 	if [ ! -d "$PATH_PUBKEYS_DIR" ]; then
 		exit 0
 	fi
-	find "$PATH_PUBKEYS_DIR/" -type f -name '*.pub' ! -name '*-cert.pub' | {
+	find "$PATH_PUBKEYS_DIR" -type f -name '*.pub' ! -name '*-cert.pub' |
+	    sort | {
 		ca_comment=$(get_ca_sk_comment_from_pk "$PATH_CA_PUB")
 		: ${ca_comment:=cassh}