diff --git a/src/JsonResponse.php b/src/JsonResponse.php
index be9cc62..639ce55 100644
--- a/src/JsonResponse.php
+++ b/src/JsonResponse.php
@@ -125,10 +125,10 @@ class JsonResponse implements JsonSerializable
      *
      * @return $this
      */
-    public function sendHeaders(): JsonResponse
+    public function sendHeaders(): JsonResponse 
     {        
         // headers have already been sent by the developer
-        if (!headers_sent()) {
+        if (!headers_sent() && !in_array(php_sapi_name(), ['cli', 'cli-server',' phpdbg'], true)) {
 
             // headers
             foreach ($this->headers as $name => $value) {
@@ -137,7 +137,8 @@ class JsonResponse implements JsonSerializable
 
             // status
             $statusText = self::HTTP_CODES[$this->code];
-            header("HTTP/1.0 {$this->code} $statusText");
+            $protocol = !empty($_SERVER['SERVER_PROTOCOL']) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.1';
+            header("$protocol {$this->code} $statusText");
         }
 
         return $this;