diff --git a/system/HTTP/CURLRequest.php b/system/HTTP/CURLRequest.php
index dadc1eff34ea..92ab3946b90c 100644
--- a/system/HTTP/CURLRequest.php
+++ b/system/HTTP/CURLRequest.php
@@ -658,6 +658,12 @@ protected function setCURLOptions(array $curlOptions = [], array $config = [])
                 $curlOptions[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_1_1;
             } elseif ($version === '2.0') {
                 $curlOptions[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_2_0;
+            } elseif ($version === '3.0') {
+                if (! defined('CURL_HTTP_VERSION_3')) {
+                    define('CURL_HTTP_VERSION_3', 30);
+                }
+
+                $curlOptions[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_3;
             }
         }
 
diff --git a/tests/system/HTTP/CURLRequestTest.php b/tests/system/HTTP/CURLRequestTest.php
index f14198be2264..32415c86d3ee 100644
--- a/tests/system/HTTP/CURLRequestTest.php
+++ b/tests/system/HTTP/CURLRequestTest.php
@@ -1156,6 +1156,22 @@ public function testHTTPv2(): void
         $this->assertSame(CURL_HTTP_VERSION_2_0, $options[CURLOPT_HTTP_VERSION]);
     }
 
+    public function testHTTPv3(): void
+    {
+        $this->request->request('POST', '/post', [
+            'version' => 3.0,
+        ]);
+
+        $options = $this->request->curl_options;
+
+        if (! defined('CURL_HTTP_VERSION_3')) {
+            define('CURL_HTTP_VERSION_3', 30);
+        }
+
+        $this->assertArrayHasKey(CURLOPT_HTTP_VERSION, $options);
+        $this->assertSame(CURL_HTTP_VERSION_3, $options[CURLOPT_HTTP_VERSION]);
+    }
+
     public function testCookieOption(): void
     {
         $holder = SUPPORTPATH . 'HTTP/Files/CookiesHolder.txt';