diff --git a/scripts/check_certificates.sh b/scripts/check_certificates.sh
index d7559b2..ea3288d 100755
--- a/scripts/check_certificates.sh
+++ b/scripts/check_certificates.sh
@@ -4,13 +4,20 @@
 	
 	DOMAIN_DIR=$DOMAIN_DIR
 	CERT_DIR=$CERT_DIR
+	DOMAIN=$1
 
-create_self_signed_certificate() { 
-# generate key
-openssl req -x509 -newkey rsa:4096 -keyout $CERT_DIR/key.pem -out $CERT_DIR/cert.pem -days 365 -sha256 -nodes -subj '/CN=domain.tld'
 
 # generate dhparam file
 openssl dhparam -out $CERT_DIR/dhparam.pem 4096 
+
+create_self_signed_certificate() { 
+# generate key
+openssl req -x509 -newkey rsa:4096 -keyout $CERT_DIR/key.pem -out $CERT_DIR/cert.pem -days 365 -sha256 -nodes -subj '/CN=$DOMAIN'
+
 }
 
 
+if [[ "$(ls -A $CERT_DIR)" == "" ]]; then
+	echo "$DOMAIN not contains certificates, creates new."
+	create_self_signed_certificate;
+fi
diff --git a/scripts/nginx_config_create.sh b/scripts/nginx_config_create.sh
index 13eed3e..5abb826 100755
--- a/scripts/nginx_config_create.sh
+++ b/scripts/nginx_config_create.sh
@@ -2,10 +2,13 @@
 
 JQ="jq -r"
 
+cd /proxy_config
+
 DOMAIN=$1
 DEL=$2
 if [[ "$DEL" != "" ]]; then
 	echo "$DOMAIN DELETED";
+	rm $DOMAIN.conf;
 	exit;
 fi
 
@@ -21,11 +24,15 @@ REDIRECT_HTTP=$(jq -r .REDIRECT_HTTP $DOMAIN_SOURCE)
 REDIRECT_HTTPS=$(jq -r .REDIRECT_HTTPS $DOMAIN_SOURCE)
 ERROR_PAGE=$(jq -r .ERROR_PAGE $DOMAIN_SOURCE)
 
+# check whether certificates exist or not
+
+if [ $HTTPS_PORT != "" ]; then
+	./check_certificates.sh "$DOMAIN";
+fi
+
 echo $DOMAIN;
 exit;
 
-cd /proxy_config
-
 file="$DOMAIN.conf"
 
 cp -a nginx_template.conf $DOMAIN.conf
@@ -79,7 +86,7 @@ listen $HTTPS_PORT ssl;
 server_name $DOMAIN_NAME;
 rewrite_log on
 proxy_ssl_server_name on; 
-ssl_dhparam /etc/ssl/keys/dhparams.pem;
+ssl_dhparam /etc/ssl/keys/dhparam.pem;
  ssl_certificate /etc/ssl/keys/fullchain.pem;
  ssl_certificate_key /etc/ssl/keys/key.pem;
  ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
@@ -119,10 +126,3 @@ echo "location / {
 
 } >> "$file"
 
-# check whether certificates exist or not
-
-if [ $HTTPS_PORT != "" ]; then
-	./check_certificates.sh;
-fi
-
-