diff --git a/scripts/install b/scripts/install
index 5f0e42d..b3fd84a 100644
--- a/scripts/install
+++ b/scripts/install
@@ -83,12 +83,12 @@ sudo sed -i "s@__DB_SHA__@$db_sha@g" ../conf/sql/spip.sql
 
 for i in 1 2 3 4 5 6 7 8
 do
-	j=$(cat /dev/urandom | tr -dc '0-9' | fold -w 32 | head -n 1)
+	j=$(dd if=/dev/urandom bs=1 count=200 2> /dev/null | tr -c -d '[A-Za-z0-9]' | sed -n 's/\(.\{40\}\).*/\1/p')
 	if [ "$j" = "" ];
 	then
 		# For obscure reasons, the loop is too fast at execution
 		sleep 1
-		j=$(cat /dev/urandom | tr -dc '0-9' | fold -w 32 | head -n 1)
+		j=$(dd if=/dev/urandom bs=1 count=200 2> /dev/null | tr -c -d '[A-Za-z0-9]' | sed -n 's/\(.\{40\}\).*/\1/p')
 	fi
 	sudo sed -i "s/__ALEA_ACTUEL__/$j/g" ../conf/sql/spip.sql
 	sudo sed -i "s/__ALEA_FUTUR__/$j/g" ../conf/sql/spip.sql