diff --git a/README.md b/README.md
index 06e7095..37e9749 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,6 @@ Requirements :
 run `./install.sh` ; note that you need sudo permissions.
 
 ### How to use
-The whole wrapper interfaces through a simple file at `/tmp/.unlocked`. To lock your screen, simply delete this file. After the install the service 'xlock@USER.path' with `USER` being the user that launched the install. To start it `systemctl start xlock@USER.path`, at the install it is enabled by default, thus it is launched when you boot.
+The whole wrapper interfaces through a random file at `/tmp/RANDOM.xlock`. To lock your screen, simply delete this file. After the install the service 'xlock@USER.path' with `USER` being the user that launched the install. To start it `systemctl start xlock@USER.path`, at the install it is enabled by default, thus it is launched when you boot.
 
-To add a key binding or to automate your script lock, simply delete the `/tmp/.unlocked` file.
\ No newline at end of file
+To add a key binding or to automate your script lock, simply delete files for the pattern `/tmp/*.xlock`.
\ No newline at end of file
diff --git a/src/xlock b/src/xlock
index 902e7d4..58112f8 100644
--- a/src/xlock
+++ b/src/xlock
@@ -1,21 +1,18 @@
 #!/bin/bash
 screenshot_f="/tmp/.lock.screenshot.png";
-unlock_f="/tmp/.unlocked";
+unlock_f="`mktemp --suffix=.xlock`";
 log_b="0";
 
+rm "$unlock_f";
+
 while true; do
 
-	# if lock file -> wait for changes
-	if [ -f "$unlock_f" ]; then
+	# if lock file -> wait until it is deleted
+	while [ -f "$unlock_f" ]; do
+		sleep 1;
+	done;
 
-		# wait while file exists
-		while [ -f "$unlock_f" ]; do
-			sleep 1;
-		done;
-
-		# re-lock when deleted
-		continue;
-	fi;
+	# re-lock when deleted
 
 
 	# take screenshot (if not exists)