diff --git a/confs/global/map-referrer.conf b/confs/global/map-referrer.conf
deleted file mode 100644
index d7e24d2..0000000
--- a/confs/global/map-referrer.conf
+++ /dev/null
@@ -1,5 +0,0 @@
-map $http_referer $bad_referrer {
-	hostnames;
-	default no;
-	%BLOCK_REFERRER%
-}
diff --git a/confs/global/map-user-agent.conf b/confs/global/map-user-agent.conf
deleted file mode 100644
index 468c37c..0000000
--- a/confs/global/map-user-agent.conf
+++ /dev/null
@@ -1,4 +0,0 @@
-map $http_user_agent $bad_user_agent {
-	default no;
-	%BLOCK_USER_AGENT%
-}
diff --git a/scripts/referrers.sh b/scripts/referrers.sh
index a49b987..f702913 100755
--- a/scripts/referrers.sh
+++ b/scripts/referrers.sh
@@ -1,5 +1,9 @@
 #!/bin/sh
 
+if [ ! -f "/etc/nginx/map-referrer.conf" ] ; then
+	echo "" > /etc/nginx/map-referrer.conf
+fi
+
 BLACKLIST="$(curl -s https://raw.githubusercontent.com/mitchellkrogza/nginx-ultimate-bad-bot-blocker/master/_generator_lists/bad-referrers.list)"
 DATA=""
 IFS=$'\n'
diff --git a/scripts/user-agents.sh b/scripts/user-agents.sh
index f1c93c5..c3ac5fe 100755
--- a/scripts/user-agents.sh
+++ b/scripts/user-agents.sh
@@ -1,24 +1,18 @@
 #!/bin/sh
 
-# replace pattern in file
-function replace_in_file() {
-        # escape slashes
-        pattern=$(echo "$2" | sed "s/\//\\\\\//g")
-        replace=$(echo "$3" | sed "s/\//\\\\\//g")
-        replace=$(echo "$replace" | sed "s/\\ /\\\\ /g")
-        sed -i "s/$pattern/$replace/g" "$1"
-}
+if [ ! -f "/etc/nginx/map-user-agent.conf" ] ; then
+	echo "" > /etc/nginx/map-user-agent.conf
+fi
 
 BLACKLIST="$(curl -s https://raw.githubusercontent.com/mitchellkrogza/nginx-ultimate-bad-bot-blocker/master/_generator_lists/bad-user-agents.list)"
 DATA=""
 IFS=$'\n'
 for ua in $BLACKLIST ; do
-        DATA="${DATA}~*(?:\\\\b)${ua}\(?:\\\\b) yes;\n"
+        DATA="${DATA}~*(?:\\\\b)${ua}(?:\\\\b) yes;\n"
 done
 DATA_ESCAPED=$(echo "$DATA" | sed 's: :\\\\ :g' | sed 's:\\\\ yes;: yes;:g' | sed 's:\\\\\\ :\\\\ :g')
 
-cp /opt/confs/global/map-user-agent.conf /etc/nginx/map-user-agent.conf
-replace_in_file "/etc/nginx/map-user-agent.conf" "%BLOCK_USER_AGENT%" "$DATA_ESCAPED"
+echo -e "map \$http_user_agent \$bad_user_agent { default no; $DATA_ESCAPED }" > /etc/nginx/map-user-agent.conf
 cp /etc/nginx/map-user-agent.conf /cache
 
 if [ -f /tmp/nginx.pid ] ; then