diff --git a/public_html/appmonitor/classes/appmonitor-client.class.php b/public_html/appmonitor/classes/appmonitor-client.class.php
index ae2d3003900b206f50cf2187c23dee97bd6b90fa..d9b1d8bda9267c3de9e1e0c4c52cd2b076d255b8 100755
--- a/public_html/appmonitor/classes/appmonitor-client.class.php
+++ b/public_html/appmonitor/classes/appmonitor-client.class.php
@@ -48,8 +48,9 @@ if (!class_exists('appmonitorcheck')) {
  * 2025-03-04  0.154  axel.hahn@unibe.ch      finish with exitcode instead of die()
  * 2025-03-17  0.155  axel.hahn@unibe.ch      added: getVersion() and setVersion()
  * 2025-03-19  0.156  axel.hahn@unibe.ch      added: validation rules for parameters in all checks
+ * 2025-03-24  0.157  axel.hahn@unibe.ch      update validator for bool check in ini files
  * --------------------------------------------------------------------------------<br>
- * @version 0.155
+ * @version 0.157
  * @author Axel Hahn
  * @link TODO
  * @license GPL
@@ -63,7 +64,7 @@ class appmonitor
      * Name and Version number
      * @var string
      */
-    protected string $_sVersion = '0.156';
+    protected string $_sVersion = '0.157';
 
     /**
      * config: default ttl for server before requesting the client check again
diff --git a/public_html/appmonitor/classes/validateparam.class.php b/public_html/appmonitor/classes/validateparam.class.php
index dfdf41d4667b8aa2698d5ba07fa0620f9a84c0af..a3e7c0060b270061f747a4850a20858f5495dfde 100644
--- a/public_html/appmonitor/classes/validateparam.class.php
+++ b/public_html/appmonitor/classes/validateparam.class.php
@@ -96,7 +96,10 @@ class validateparam
                     break;
                 case 'bool':
                     if (!is_bool($value)) {
-                        $sError .= "Value '$value' isn't a bool";
+                        // special case for bool after ini parsing
+                        if(!$value==="" || !$value===1){
+                            $sError .= "Value '$value' isn't a bool";
+                        }
                     }
                     break;
 
diff --git a/public_html/appmonitor/plugins/checks/cert.php b/public_html/appmonitor/plugins/checks/cert.php
index 311e6d58c965a66fa4552ee365f9602e119bb6f7..864fe1034daa353735eb1be5d76ddc61e243e877 100755
--- a/public_html/appmonitor/plugins/checks/cert.php
+++ b/public_html/appmonitor/plugins/checks/cert.php
@@ -57,7 +57,7 @@ class checkCert extends appmonitorcheck
             'url' => [
                 'type' => 'string',
                 'required' => true,
-                'description' => 'Url to check https://[server}[:{port}] or ssl://[server}[:{port}]',
+                'description' => 'Url to check https://[server}[:{port}] or ssl://[server}[:{port}]; autodetected on webserver with php but required on cli',
                 'default' => null,
                 'regex'=>'/^(https|ssl):\/\/[^\s]+/',
                 'example' => '',
@@ -86,6 +86,18 @@ class checkCert extends appmonitorcheck
         ],
     ];
 
+    /**
+     * Override explain()
+     * If https is used, url is not required because it can be autodetected from $_SERVER
+     */
+    public function explain(): array
+    {
+        if($_SERVER['HTTPS']??false && $_SERVER['SERVER_NAME']??false){
+            $this->_aDoc['parameters']['url']['required']=false;
+        }
+        return $this->_aDoc;
+    }
+
     /**
      * Get default group of this check
      * @return string