diff --git a/border_flash.sh b/border_flash.sh
index 90f7943..ff6e83e 100755
--- a/border_flash.sh
+++ b/border_flash.sh
@@ -1,7 +1,15 @@
 #!/bin/sh
+_lockfile="$HOME/.cache/border_flash_lock"
+if [ -f $_lockfile ] ; then
+	rm "$_lockfile"
+fi
 
 bspc subscribe node_focus | while read -a msg ; do
-	bspc config focused_border_color '#ff2222' \
-	&& sleep 0.2 \
-	&& bspc config focused_border_color '#222222'
+	if ! [ -f $_lockfile ] ; then
+		touch "$_lockfile" \
+		&& bspc config focused_border_color '#ff2222' \
+		&& sleep 1 \
+		&& bspc config focused_border_color '#222222' \
+		&& rm "$_lockfile" &
+	fi
 done