diff --git a/deploy/gcore_cdn.sh b/deploy/gcore_cdn.sh
new file mode 100644
index 0000000..56ca9af
--- /dev/null
+++ b/deploy/gcore_cdn.sh
@@ -0,0 +1,140 @@
+#!/usr/bin/env sh
+
+# Here is the script to deploy the cert to G-Core CDN service (https://gcorelabs.com/ru/) using the G-Core Labs API (https://docs.gcorelabs.com/cdn/).
+# Uses command line curl for send requests and jq for parse responses.
+# Returns 0 when success.
+#
+# Written by temoffey <temofffey@gmail.com>
+# Public domain, 2019
+
+#export DEPLOY_GCORE_CDN_USERNAME=myusername
+#export DEPLOY_GCORE_CDN_PASSWORD=mypassword
+
+########  Public functions #####################
+
+#domain keyfile certfile cafile fullchain
+
+gcore_cdn_deploy() {
+  _cdomain="$1"
+  _ckey="$2"
+  _ccert="$3"
+  _cca="$4"
+  _cfullchain="$5"
+
+  _debug _cdomain "$_cdomain"
+  _debug _ckey "$_ckey"
+  _debug _ccert "$_ccert"
+  _debug _cca "$_cca"
+  _debug _cfullchain "$_cfullchain"
+
+  _fullchain=$(tr '\n\r' '@#' <"$_cfullchain" | sed 's/@/\\n/g;s/#/\\r/g')
+  _key=$(tr '\n\r' '@#' <"$_ckey" | sed 's/@/\\n/g;s/#/\\r/g')
+
+  _debug _fullchain "$_fullchain"
+  _debug _key "$_key"
+
+  if [ -z "$DEPLOY_GCORE_CDN_USERNAME" ]; then
+    if [ -z "$Le_Deploy_gcore_cdn_username" ]; then
+      _err "Please define the target username: export DEPLOY_GCORE_CDN_USERNAME=username"
+      return 1
+    fi
+  else
+    Le_Deploy_gcore_cdn_username="$DEPLOY_GCORE_CDN_USERNAME"
+    _savedomainconf Le_Deploy_gcore_cdn_username "$Le_Deploy_gcore_cdn_username"
+  fi
+
+  if [ -z "$DEPLOY_GCORE_CDN_PASSWORD" ]; then
+    if [ -z "$Le_Deploy_gcore_cdn_password" ]; then
+      _err "Please define the target password: export DEPLOY_GCORE_CDN_PASSWORD=password"
+      return 1
+    fi
+  else
+    Le_Deploy_gcore_cdn_password="$DEPLOY_GCORE_CDN_PASSWORD"
+    _savedomainconf Le_Deploy_gcore_cdn_password "$Le_Deploy_gcore_cdn_password"
+  fi
+
+  _info "Get authorization token"
+  _request="{\"username\":\"$Le_Deploy_gcore_cdn_username\",\"password\":\"$Le_Deploy_gcore_cdn_password\"}"
+  _debug _request "$_request"
+  export _H1="Content-Type:application/json"
+  _response=$(_post "$_request" "https://api.gcdn.co/auth/signin")
+  _debug _response "$_response"
+  _regex=".*\"token\":\"\([-._0-9A-Za-z]*\)\".*$"
+  _debug _regex "$_regex"
+  _token=$(echo "$_response" | sed -n "s/$_regex/\1/p")
+  _debug _token "$_token"
+
+  if [ -z "$_token" ]; then
+    _err "Error G-Core Labs API authorization"
+    return 1
+  fi
+
+  _info "Find CDN resource with cname $_cdomain"
+  export _H2="Authorization:Token $_token"
+  _response=$(_get "https://api.gcdn.co/resources")
+  _debug _response "$_response"
+  _regex=".*(\"id\".*?\"cname\":\"$_cdomain\".*?})"
+  _regex="^.*\"cname\":\"$_cdomain\".*$"
+  _debug _regex "$_regex"
+  _resource=$(echo "$_response" | sed 's/},{/},\n{/g' | _egrep_o "$_regex")
+  _debug _resource "$_resource"
+  _regex=".*\"id\":\([0-9]*\),.*$"
+  _debug _regex "$_regex"
+  _resourceId=$(echo "$_resource" | sed -n "s/$_regex/\1/p")
+  _debug _resourceId "$_resourceId"
+  _regex=".*\"sslData\":\([0-9]*\)}.*$"
+  _debug _regex "$_regex"
+  _sslDataOld=$(echo "$_resource" | sed -n "s/$_regex/\1/p")
+  _debug _sslDataOld "$_sslDataOld"
+  _regex=".*\"originGroup\":\([0-9]*\),.*$"
+  _debug _regex "$_regex"
+  _originGroup=$(echo "$_resource" | sed -n "s/$_regex/\1/p")
+  _debug _originGroup "$_originGroup"
+
+  if [ -z "$_resourceId" ] || [ -z "$_originGroup" ]; then
+    _err "Not found CDN resource with cname $_cdomain"
+    return 1
+  fi
+
+  _info "Add new SSL certificate"
+  _date=$(date "+%d.%m.%Y %H:%M:%S")
+  _request="{\"name\":\"$_cdomain ($_date)\",\"sslCertificate\":\"$_fullchain\",\"sslPrivateKey\":\"$_key\"}"
+  _debug _request "$_request"
+  _response=$(_post "$_request" "https://api.gcdn.co/sslData")
+  _debug _response "$_response"
+  _regex=".*\"id\":\([0-9]*\),.*$"
+  _debug _regex "$_regex"
+  _sslDataAdd=$(echo "$_response" | sed -n "s/$_regex/\1/p")
+  _debug _sslDataAdd "$_sslDataAdd"
+
+  if [ -z "$_sslDataAdd" ]; then
+    _err "Error new SSL certificate add"
+    return 1
+  fi
+
+  _info "Update CDN resource"
+  _request="{\"originGroup\":$_originGroup,\"sslData\":$_sslDataAdd}"
+  _debug _request "$_request"
+  _response=$(_post "$_request" "https://api.gcdn.co/resources/$_resourceId" '' "PUT")
+  _debug _response "$_response"
+  _regex=".*\"sslData\":\([0-9]*\)}.*$"
+  _debug _regex "$_regex"
+  _sslDataNew=$(echo "$_response" | sed -n "s/$_regex/\1/p")
+  _debug _sslDataNew "$_sslDataNew"
+
+  if [ "$_sslDataNew" != "$_sslDataAdd" ]; then
+    _err "Error CDN resource update"
+    return 1
+  fi
+
+  if [ -z "$_sslDataOld" ] || [ "$_sslDataOld" = "null" ]; then
+    _info "Not found old SSL certificate"
+  else
+    _info "Delete old SSL certificate"
+    _response=$(_post '' "https://api.gcdn.co/sslData/$_sslDataOld" '' "DELETE")
+    _debug _response "$_response"
+  fi
+
+  _info "Certificate successfully deployed"
+  return 0
+}
diff --git a/dnsapi/dns_dgon.sh b/dnsapi/dns_dgon.sh
index 24e1a9f..c176afd 100755
--- a/dnsapi/dns_dgon.sh
+++ b/dnsapi/dns_dgon.sh
@@ -178,7 +178,7 @@ dns_dgon_rm() {
 ## _domain="domain.com"
 _get_base_domain() {
   # args
-  fulldomain="$(echo "$1" | tr '[:upper:]' '[:lower:]')"
+  fulldomain="$(echo "$1" | _lower_case)"
   _debug fulldomain "$fulldomain"
 
   # domain max legal length = 253