diff --git a/CHANGELOG.md b/CHANGELOG.md
index a183e90..734d584 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ Yii Framework 2 HTTP client extension Change Log
 2.0.16 under development
 ------------------------
 
-- no changes in this release.
+- Bug #240: Fixed `\yii\httpclient\Response::getIsOk()` to include entire 2xx response code range (rhertogh)
 
 
 2.0.15 May 22, 2023
diff --git a/src/Response.php b/src/Response.php
index cbac62a..7418015 100644
--- a/src/Response.php
+++ b/src/Response.php
@@ -69,13 +69,14 @@ public function getStatusCode()
     }
 
     /**
-     * Checks if response status code is OK (status code = 20x)
+     * Checks if response status code is OK (status code = 2xx)
      * @return bool whether response is OK.
      * @throws Exception
      */
     public function getIsOk()
     {
-        return strncmp('20', $this->getStatusCode(), 2) === 0;
+        $statusCode = (int)$this->getStatusCode();
+        return $statusCode >= 200 && $statusCode < 300;
     }
 
     /**
diff --git a/tests/ResponseTest.php b/tests/ResponseTest.php
index 75af277..a7fb56d 100644
--- a/tests/ResponseTest.php
+++ b/tests/ResponseTest.php
@@ -199,8 +199,10 @@ public function testUnableToGetStatusCode()
     public function dataProviderIsOk()
     {
         return [
+            [100, false],
             [200, true],
             [201, true],
+            [226, true],
             [400, false],
         ];
     }