diff --git a/letsencrypt/CHANGELOG.md b/letsencrypt/CHANGELOG.md
index a71d2a4..807f2b4 100755
--- a/letsencrypt/CHANGELOG.md
+++ b/letsencrypt/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## 4.2
+- Bugfix default empty dns setting
+
 ## 4.1
 
 - Pin image to Alpine3.10
diff --git a/letsencrypt/README.md b/letsencrypt/README.md
index 86df3a1..85fb02c 100644
--- a/letsencrypt/README.md
+++ b/letsencrypt/README.md
@@ -44,7 +44,37 @@ IF you choose "dns" as "challenge", you will also need to fill:
 ```json
   "dnsprovider": "" (Add the dnsprovider of your choice from the list of "Supported DNS providers" below)
 
-In addition fill the fields according to the credentials required by your dns provider.
+In addition add the fields according to the credentials required by your dns provider:
+
+```json
+"cloudflare_email": "",
+"cloudflare_api_key": "",
+"cloudxns_api_key": "",
+"cloudxns_secret_key": "",
+"digitalocean_token": "",
+"dnsimple_token": "",
+"dnsmadeeasy_api_key": "",
+"dnsmadeeasy_secret_key": "",
+"gehirn_api_token": "",
+"gehirn_api_secret": "",
+"linode_key": "",
+"linode_version": "",
+"luadns_email": "",
+"luadns_token": "",
+"nsone_api_key": "",
+"ovh_endpoint": "",
+"ovh_application_key": "",
+"ovh_application_secret": "",
+"ovh_consumer_key": "",
+"rfc2136_server": "",
+"rfc2136_port": "",
+"rfc2136_name": "",
+"rfc2136_secret": "",
+"rfc2136_algorithm": "",
+"aws_access_key_id": "",
+"aws_secret_access_key": "",
+"sakuracloud_api_token": "",
+"sakuracloud_api_secret": ""
 ```
 
 ## Configuration
diff --git a/letsencrypt/config.json b/letsencrypt/config.json
index 9de33aa..4c80ab6 100755
--- a/letsencrypt/config.json
+++ b/letsencrypt/config.json
@@ -1,6 +1,6 @@
 {
   "name": "Let's Encrypt",
-  "version": "4.1",
+  "version": "4.2",
   "slug": "letsencrypt",
   "description": "Manage certificate from Let's Encrypt",
   "url": "https://home-assistant.io/addons/lets_encrypt/",
diff --git a/letsencrypt/run.sh b/letsencrypt/run.sh
index f8ab1e2..cd5f501 100755
--- a/letsencrypt/run.sh
+++ b/letsencrypt/run.sh
@@ -5,7 +5,7 @@ DOMAINS=$(bashio::config 'domains')
 KEYFILE=$(bashio::config 'keyfile')
 CERTFILE=$(bashio::config 'certfile')
 CHALLENGE=$(bashio::config 'challenge')
-DNS_PROVIDER=$(bashio::config 'dns.provider // empty')
+DNS_PROVIDER=$(bashio::config 'dns.provider')
 
 CERT_DIR=/data/letsencrypt
 WORK_DIR=/data/workdir
@@ -16,34 +16,34 @@ mkdir -p "/ssl"
 chmod +x /run.sh
 touch /data/dnsapikey
 
-echo -e "dns_cloudflare_email = $(bashio::config 'dns.cloudflare_email // empty')\n" \
-  "dns_cloudflare_api_key = $(bashio::config 'dns.cloudflare_api_key // empty')\n" \
-  "dns_cloudxns_api_key = $(bashio::config 'dns.cloudxns_api_key // empty')\n" \
-  "dns_cloudxns_secret_key = $(bashio::config 'dns.cloudxns_secret_key // empty')\n" \
-  "dns_digitalocean_token = $(bashio::config 'dns.digitalocean_token // empty')\n" \
-  "dns_dnsimple_token = $(bashio::config 'dns.dnsimple_token // empty')\n" \
-  "dns_dnsmadeeasy_api_key = $(bashio::config 'dns.dnsmadeeasy_api_key // empty')\n" \
-  "dns_dnsmadeeasy_secret_key = $(bashio::config 'dns.dnsmadeeasy_secret_key // empty')\n" \
-  "dns_gehirn_api_token = $(bashio::config 'dns.gehirn_api_token // empty')\n" \
-  "dns_gehirn_api_secret = $(bashio::config 'dns.gehirn_api_secret // empty')\n" \
-  "dns_linode_key = $(bashio::config 'dns.linode_key // empty')\n" \
-  "dns_linode_version = $(bashio::config 'dns.linode_version // empty')\n" \
-  "dns_luadns_email = $(bashio::config 'dns.luadns_email // empty')\n" \
-  "dns_luadns_token = $(bashio::config 'dns.luadns_token // empty')\n" \
-  "dns_nsone_api_key = $(bashio::config 'dns.nsone_api_key // empty')\n" \
-  "dns_ovh_endpoint = $(bashio::config 'dns.ovh_endpoint // empty')\n" \
-  "dns_ovh_application_key = $(bashio::config 'dns.ovh_application_key // empty')\n" \
-  "dns_ovh_application_secret = $(bashio::config 'dns.ovh_application_secret // empty')\n" \
-  "dns_ovh_consumer_key = $(bashio::config 'dns.ovh_consumer_key // empty')\n" \
-  "dns_rfc2136_server = $(bashio::config 'dns.rfc2136_server // empty')\n" \
-  "dns_rfc2136_port = $(bashio::config 'dns.rfc2136_port // empty')\n" \
-  "dns_rfc2136_name = $(bashio::config 'dns.rfc2136_name // empty')\n" \
-  "dns_rfc2136_secret = $(bashio::config 'dns.rfc2136_secret // empty')\n" \
-  "dns_rfc2136_algorithm = $(bashio::config 'dns.rfc2136_algorithm // empty')\n" \
-  "aws_access_key_id = $(bashio::config 'dns.aws_access_key_id // empty')\n" \
-  "aws_secret_access_key = $(bashio::config 'dns.aws_secret_access_key // empty')\n" \
-  "dns_sakuracloud_api_token = $(bashio::config 'dns.sakuracloud_api_token // empty')\n" \
-  "dns_sakuracloud_api_secret = $(bashio::config 'dns.sakuracloud_api_secret // empty')" > /data/dnsapikey
+echo -e "dns_cloudflare_email = $(bashio::config 'dns.cloudflare_email')\n" \
+  "dns_cloudflare_api_key = $(bashio::config 'dns.cloudflare_api_key')\n" \
+  "dns_cloudxns_api_key = $(bashio::config 'dns.cloudxns_api_key')\n" \
+  "dns_cloudxns_secret_key = $(bashio::config 'dns.cloudxns_secret_key')\n" \
+  "dns_digitalocean_token = $(bashio::config 'dns.digitalocean_token')\n" \
+  "dns_dnsimple_token = $(bashio::config 'dns.dnsimple_token')\n" \
+  "dns_dnsmadeeasy_api_key = $(bashio::config 'dns.dnsmadeeasy_api_key')\n" \
+  "dns_dnsmadeeasy_secret_key = $(bashio::config 'dns.dnsmadeeasy_secret_key')\n" \
+  "dns_gehirn_api_token = $(bashio::config 'dns.gehirn_api_token')\n" \
+  "dns_gehirn_api_secret = $(bashio::config 'dns.gehirn_api_secret')\n" \
+  "dns_linode_key = $(bashio::config 'dns.linode_key')\n" \
+  "dns_linode_version = $(bashio::config 'dns.linode_version')\n" \
+  "dns_luadns_email = $(bashio::config 'dns.luadns_email')\n" \
+  "dns_luadns_token = $(bashio::config 'dns.luadns_token')\n" \
+  "dns_nsone_api_key = $(bashio::config 'dns.nsone_api_key')\n" \
+  "dns_ovh_endpoint = $(bashio::config 'dns.ovh_endpoint')\n" \
+  "dns_ovh_application_key = $(bashio::config 'dns.ovh_application_key')\n" \
+  "dns_ovh_application_secret = $(bashio::config 'dns.ovh_application_secret')\n" \
+  "dns_ovh_consumer_key = $(bashio::config 'dns.ovh_consumer_key')\n" \
+  "dns_rfc2136_server = $(bashio::config 'dns.rfc2136_server')\n" \
+  "dns_rfc2136_port = $(bashio::config 'dns.rfc2136_port')\n" \
+  "dns_rfc2136_name = $(bashio::config 'dns.rfc2136_name')\n" \
+  "dns_rfc2136_secret = $(bashio::config 'dns.rfc2136_secret')\n" \
+  "dns_rfc2136_algorithm = $(bashio::config 'dns.rfc2136_algorithm')\n" \
+  "aws_access_key_id = $(bashio::config 'dns.aws_access_key_id')\n" \
+  "aws_secret_access_key = $(bashio::config 'dns.aws_secret_access_key')\n" \
+  "dns_sakuracloud_api_token = $(bashio::config 'dns.sakuracloud_api_token')\n" \
+  "dns_sakuracloud_api_secret = $(bashio::config 'dns.sakuracloud_api_secret')" > /data/dnsapikey
 chmod 600 /data/dnsapikey
 
 # Generate new certs