diff --git a/_config/config.yml b/_config/config.yml
new file mode 100644
index 0000000..6c9ca7e
--- /dev/null
+++ b/_config/config.yml
@@ -0,0 +1,9 @@
+SilverStripe\Core\Injector\Injector:
+  Psr\SimpleCache\CacheInterface.OP:
+    factory: SilverStripe\Core\Cache\CacheFactory
+    constructor:
+      namespace: 'OP'
+      defaultLifetime: 3600
+      backend: 'Filesystem'
+      disable-container: true
+      directory: 'assets/jsoncache'
\ No newline at end of file
diff --git a/code/CRM.php b/code/CRM.php
index b171729..442d293 100644
--- a/code/CRM.php
+++ b/code/CRM.php
@@ -10,8 +10,8 @@
 use Exception;
 use Fiber;
 use Psr\Log\LoggerInterface;
+use Psr\SimpleCache\CacheInterface;
 use SilverStripe\Core\Injector\Injector;
-use Symfony\Component\Cache\Simple\FilesystemCache;
 use SilverStripe\Dev\Debug;
 
 class CRM
@@ -37,8 +37,7 @@ class CRM
      */
     public function __construct()
     {
-
-        $cache = new FilesystemCache('OP');
+        $cache = Injector::inst()->get(CacheInterface::class . '.OP');
 
         if ($cache->has($this->getCacheKey())) {
             $this->access_token = $cache->get($this->getCacheKey());
@@ -87,8 +86,7 @@ protected function CreateTokenHTTPQuery()
      * 
      * @return string
      */
-    public function getResourceURL()
-    {
+    public function getResourceURL() {
         return Environment::getEnv('AZUREAPPLICATIONRESOURCELOCATION');
     }
 
@@ -131,7 +129,7 @@ private function RequestAccessToken()
 
         // set the cache and the time to live according to the result
         if (isset($content->expires_in)) {
-            $cache = new FilesystemCache('OP');
+            $cache = Injector::inst()->get(CacheInterface::class . '.OP');
             $this->access_token = $cache->set($this->getCacheKey(), $content->access_token, (int) $content->expires_in);
         }
 
@@ -176,7 +174,7 @@ public function fetch($webservice_url_str, $method = "GET", $postdata = null, $e
         // return data and try for 5 seconds
         curl_setopt($session, CURLOPT_RETURNTRANSFER, true);
         curl_setopt($session, CURLOPT_CONNECTTIMEOUT, 5);
-        // curl_setopt($session, CURLOPT_VERBOSE, 1);
+       // curl_setopt($session, CURLOPT_VERBOSE, 1);
         curl_setopt($session, CURLOPT_HEADER, 1);
 
         //CWP proxy stuff
diff --git a/readme.md b/readme.md
index 0054aa5..9cd023f 100644
--- a/readme.md
+++ b/readme.md
@@ -69,6 +69,9 @@ sendBatchRequest sends requests using cURL in a Fiber for asynchronous execution
 ![Step 6](images/azure4.png)
 7. You should now have everything you need to use the CRM module.
 
+# don't forget to use .htaccess to block the cache if you store it in your assets folder
+RedirectMatch 404 ^/assets/jsoncache/.*$
+
 # Using the Envornment version:
 ==================