diff --git a/ReCaptchaNoCaptcha/includes/HTMLReCaptchaNoCaptchaField.php b/ReCaptchaNoCaptcha/includes/HTMLReCaptchaNoCaptchaField.php
index e1a39a60e..83cd0a33a 100644
--- a/ReCaptchaNoCaptcha/includes/HTMLReCaptchaNoCaptchaField.php
+++ b/ReCaptchaNoCaptcha/includes/HTMLReCaptchaNoCaptchaField.php
@@ -41,7 +41,7 @@ class HTMLReCaptchaNoCaptchaField extends HTMLFormField {
 		$output = Html::element( 'div', [
 			'class' => [
 				'g-recaptcha',
-				'mw-confirmedit-captcha-fail' => !!$this->error,
+				'mw-confirmedit-captcha-fail' => (bool)$this->error,
 			],
 			'data-sitekey' => $this->key,
 		] );
diff --git a/ReCaptchaNoCaptcha/includes/ReCaptchaNoCaptcha.php b/ReCaptchaNoCaptcha/includes/ReCaptchaNoCaptcha.php
index 8006f354e..a9dcccccc 100644
--- a/ReCaptchaNoCaptcha/includes/ReCaptchaNoCaptcha.php
+++ b/ReCaptchaNoCaptcha/includes/ReCaptchaNoCaptcha.php
@@ -20,7 +20,7 @@ class ReCaptchaNoCaptcha extends SimpleCaptcha {
 		$output = Html::element( 'div', [
 			'class' => [
 				'g-recaptcha',
-				'mw-confirmedit-captcha-fail' => !!$this->error,
+				'mw-confirmedit-captcha-fail' => (bool)$this->error,
 			],
 			'data-sitekey' => $wgReCaptchaSiteKey
 		] );
diff --git a/SimpleCaptcha/SimpleCaptcha.php b/SimpleCaptcha/SimpleCaptcha.php
index 2672ca745..f4645c6fb 100644
--- a/SimpleCaptcha/SimpleCaptcha.php
+++ b/SimpleCaptcha/SimpleCaptcha.php
@@ -320,7 +320,7 @@ class SimpleCaptcha {
 	 * Check if a bad login has already been registered for this
 	 * IP address. If so, require a captcha.
 	 * @return bool
-	 * @access private
+	 * @private
 	 */
 	public function isBadLoginTriggered() {
 		global $wgCaptchaBadLoginAttempts;
@@ -683,7 +683,7 @@ class SimpleCaptcha {
 	 * Build regex from whitelist
 	 * @param string $lines string from [[MediaWiki:Captcha-addurl-whitelist]]
 	 * @return array Regexes
-	 * @access private
+	 * @private
 	 */
 	private function buildRegexes( $lines ) {
 		# Code duplicated from the SpamBlacklist extension (r19197)
@@ -1081,7 +1081,7 @@ class SimpleCaptcha {
 	 * @param string $section
 	 * @param int $flags Flags for Revision loading methods
 	 * @return string
-	 * @access private
+	 * @private
 	 */
 	private function loadText( $title, $section, $flags = Revision::READ_LATEST ) {
 		global $wgParser;
diff --git a/composer.json b/composer.json
index edad2b43e..8d8396094 100644
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,7 @@
 {
 	"require-dev": {
 		"jakub-onderka/php-parallel-lint": "1.0.0",
-		"mediawiki/mediawiki-codesniffer": "23.0.0",
+		"mediawiki/mediawiki-codesniffer": "24.0.0",
 		"jakub-onderka/php-console-highlighter": "0.3.2",
 		"mediawiki/minus-x": "0.3.1"
 	},