diff --git a/scripts/user-agents.sh b/scripts/user-agents.sh
index 9207053ff..fb704cfb1 100755
--- a/scripts/user-agents.sh
+++ b/scripts/user-agents.sh
@@ -15,18 +15,12 @@ elif [ -S /tmp/autoconf.sock ] ; then
 fi
 
 # generate new conf
-BLACKLIST="$(curl -s https://raw.githubusercontent.com/mitchellkrogza/nginx-ultimate-bad-bot-blocker/master/_generator_lists/bad-user-agents.list)
-$(curl -s https://raw.githubusercontent.com/JayBizzle/Crawler-Detect/master/raw/Crawlers.txt)"
+IFS= BLACKLIST="$(curl -s https://raw.githubusercontent.com/mitchellkrogza/nginx-ultimate-bad-bot-blocker/master/_generator_lists/bad-user-agents.list;
+curl -s https://raw.githubusercontent.com/JayBizzle/Crawler-Detect/master/raw/Crawlers.txt | sort -u)"
 if [ "$?" -ne 0 ] ; then
 	job_log "[BLACKLIST] can't update user-agent list"
 fi
-DATA=""
-IFS=$'\n'
-for ua in $BLACKLIST ; do
-        DATA="${DATA}~*${ua} yes;\n"
-done
-DATA_ESCAPED=$(echo "$DATA" | sed 's: :\\\\ :g' | sed 's:\\\\ yes;: yes;:g' | sed 's:\\\\\\ :\\\\ :g')
-echo -e "map \$http_user_agent \$bad_user_agent { default no; $DATA_ESCAPED }" > /tmp/map-user-agent.conf
+echo -e "map \$http_user_agent \$bad_user_agent { default no; $(echo $BLACKLIST | sed 's:\([^\\]\) :\1\\\\ :;s:^:~*:;s:$: yes;:') }" > /tmp/map-user-agent.conf
 
 # check number of lines
 lines="$(wc -l /tmp/map-user-agent.conf | cut -d ' ' -f 1)"