diff --git a/README.md b/README.md
index 5caf3f8..222450a 100644
--- a/README.md
+++ b/README.md
@@ -53,13 +53,13 @@ To automatically renew your certificate add the Certbot renew command in a cron
 
 ## Docker
 There is also a docker container which you can use. You can either bind mount the `config` and / or `logs` folder or use
-`ENV` variables.
+`ENV` variables. The application runs in the `/opt/certbot-dns-transip` directory.
 
-```shell
+```shell script
 docker run -ti \
--v "${PWD}/letsencrypt:/etc/letsencrypt" \
--v "${PWD}/config:/opt/certbot-dns-transip/config" \
--v "${PWD}/logs:/opt/certbot-dns-transip/logs" \
+--mount type=bind,source="${PWD}"/letsencrypt,target="/etc/letsencrypt" \
+--mount type=bind,source="${PWD}"/config,target="/opt/certbot-dns-transip/config" \
+--mount type=bind,source="${PWD}"/logs,target="/opt/certbot-dns-transip/logs" \
 rbongers/certbot-dns-transip \
 certonly --manual --preferred-challenge=dns  \
 --manual-auth-hook=/opt/certbot-dns-transip/auth-hook \
@@ -68,11 +68,11 @@ certonly --manual --preferred-challenge=dns  \
 ```
 
 And to renew certificates:
-```shell
+```shell script
 docker run -ti \
--v "${PWD}/letsencrypt:/etc/letsencrypt" \
--v "${PWD}/config:/opt/certbot-dns-transip/config" \
--v "${PWD}/logs:/opt/certbot-dns-transip/logs" \
+--mount type=bind,source="${PWD}"/letsencrypt,target="/etc/letsencrypt" \
+--mount type=bind,source="${PWD}"/config,target="/opt/certbot-dns-transip/config" \
+--mount type=bind,source="${PWD}"/logs,target="/opt/certbot-dns-transip/logs" \
 rbongers/certbot-dns-transip \
 renew
 ```
diff --git a/src/CertbotTransIpDns01/Bootstrap.php b/src/CertbotTransIpDns01/Bootstrap.php
index 4ef0e71..6ef446f 100644
--- a/src/CertbotTransIpDns01/Bootstrap.php
+++ b/src/CertbotTransIpDns01/Bootstrap.php
@@ -33,9 +33,9 @@ class Bootstrap implements LoggerAwareInterface
 
     public function __construct(HookRequestInterface $request)
     {
-        try {
-            $this->setUp();
+        $this->setUp();
 
+        try {
             if ($request instanceof AuthHookRequest) {
                 $this->acme2->authHook($request);
             } elseif ($request instanceof CleanupHookRequest) {
diff --git a/src/CertbotTransIpDns01/ConfigLoader.php b/src/CertbotTransIpDns01/ConfigLoader.php
index 954238a..a83f680 100644
--- a/src/CertbotTransIpDns01/ConfigLoader.php
+++ b/src/CertbotTransIpDns01/ConfigLoader.php
@@ -25,9 +25,10 @@ public function __construct()
             $this->config = include(APP_ROOT . '/config/transip.php');
         }
 
-        foreach ($this->requires as $required) {
-            if ($this->get($required) === null) {
-                throw new RuntimeException(sprintf("Config option '%s' not found", $required));
+        foreach ($this->requires as $requiredConfigKey) {
+            $requiredConfigKeyWithProvider = $this->get('provider') . '_' . $requiredConfigKey;
+            if ($this->get($requiredConfigKeyWithProvider, $this->get($requiredConfigKey)) === null) {
+                throw new RuntimeException(sprintf("Config option '%s' not found", $requiredConfigKey));
             }
         }
     }