diff --git a/README.md b/README.md
index 130a72d..8dc4847 100644
--- a/README.md
+++ b/README.md
@@ -63,7 +63,7 @@ $data = new Xyz(value: 10);
 $response = HttpResponse::ok(data: $data);
 
 $response->getStatusCode();          # 200
-$response->getReasonPhrase();        # 200 Ok
+$response->getReasonPhrase();        # 200 OK
 $response->getBody()->getContents(); # {"value":10}
 ```
 
diff --git a/src/HttpCode.php b/src/HttpCode.php
index 055fd22..3a51b1a 100644
--- a/src/HttpCode.php
+++ b/src/HttpCode.php
@@ -96,6 +96,11 @@ enum HttpCode: int
     public function message(): string
     {
         $subject = mb_convert_case($this->name, MB_CASE_TITLE);
+
+        if ($this->value === self::OK->value) {
+            $subject = $this->name;
+        }
+
         $message = str_replace('_', ' ', $subject);
         $template = '%s %s';
 
diff --git a/tests/HttpCodeTest.php b/tests/HttpCodeTest.php
index ba57162..d56d907 100644
--- a/tests/HttpCodeTest.php
+++ b/tests/HttpCodeTest.php
@@ -35,7 +35,7 @@ public function providerForTestMessage(): array
             ],
             [
                 'httpCode' => HttpCode::OK,
-                'expected' => '200 Ok'
+                'expected' => '200 OK'
             ],
             [
                 'httpCode' => HttpCode::CREATED,