diff --git a/admin/Evoauth.pl b/admin/Evoauth.pl
index 2f86551..60b8eb3 100644
--- a/admin/Evoauth.pl
+++ b/admin/Evoauth.pl
@@ -6,6 +6,7 @@ use strict;
 use warnings;
 use Getopt::Std;
 use Config::Tiny;
+use Fcntl;
 
 use Evoauth::Admin;
 use Evoauth::Functions;
@@ -44,3 +45,14 @@ sub Usage() {
 
 	exit;
 }
+
+BEGIN {
+	sysopen(LOCK, "/tmp/evoauth.lock", O_WRONLY|O_EXCL|O_CREAT, 0644)
+		or die "Verouillage en cours, sortie : $!";
+
+	flock(LOCK, 2);
+}
+
+END {
+	close (LOCK);
+}