diff --git a/src/packages/fff/fff-hoods/Makefile b/src/packages/fff/fff-hoods/Makefile
index d492572..5233e61 100644
--- a/src/packages/fff/fff-hoods/Makefile
+++ b/src/packages/fff/fff-hoods/Makefile
@@ -1,7 +1,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=fff-hoods
-PKG_VERSION:=3
+PKG_VERSION:=4
 PKG_RELEASE:=1
 
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)
diff --git a/src/packages/fff/fff-hoods/files/usr/sbin/configurehood b/src/packages/fff/fff-hoods/files/usr/sbin/configurehood
index 47e228b..e31ba21 100755
--- a/src/packages/fff/fff-hoods/files/usr/sbin/configurehood
+++ b/src/packages/fff/fff-hoods/files/usr/sbin/configurehood
@@ -1,5 +1,13 @@
 #!/bin/sh
 
+# Allow only one instance
+lockfile="/var/lock/${0##*/}.lock"
+if ! lock -n "$lockfile"; then
+	echo "Only one instance of $0 allowed."
+	exit 1
+fi
+trap "lock -u \"$lockfile\"" INT TERM EXIT
+
 . /usr/share/libubox/jshn.sh
 . /lib/functions/fff/keyxchange
 . /lib/functions/fff/network