diff --git a/inc/class-statifyblacklist-admin.php b/inc/class-statifyblacklist-admin.php
index 2ab7e29..2644d4c 100644
--- a/inc/class-statifyblacklist-admin.php
+++ b/inc/class-statifyblacklist-admin.php
@@ -64,7 +64,7 @@ class StatifyBlacklist_Admin extends StatifyBlacklist {
 
 			// Sanitize referer list.
 			$given_referer   = $options['referer']['blacklist'];
-			$invalid_referer = [];
+			$invalid_referer = array();
 			if ( self::MODE_NORMAL === $options['referer']['regexp'] ) {
 				// Sanitize URLs and remove empty inputs.
 				$sanitized_referer = self::sanitize_urls( $given_referer );
@@ -78,7 +78,7 @@ class StatifyBlacklist_Admin extends StatifyBlacklist {
 
 			// Sanitize target list.
 			$given_target   = $options['target']['blacklist'];
-			$invalid_target = [];
+			$invalid_target = array();
 			if ( self::MODE_REGEX === $options['target']['regexp'] || self::MODE_REGEX_CI === $options['target']['regexp'] ) {
 				$sanitized_target = $given_target;
 				// Check regular expressions.
@@ -92,22 +92,22 @@ class StatifyBlacklist_Admin extends StatifyBlacklist {
 			$sanitized_ip = self::sanitize_ips( $given_ip );
 
 			// Abort on errors.
-			$errors = [
-				'referer' => [
+			$errors = array(
+				'referer' => array(
 					'sanitized' => $sanitized_referer,
 					'diff'      => array_diff( $given_referer, $sanitized_referer ),
 					'invalid'   => $invalid_referer,
-				],
-				'target'  => [
+				),
+				'target'  => array(
 					'sanitized' => $sanitized_target,
 					'diff'      => array_diff( $given_target, $sanitized_target ),
 					'invalid'   => $invalid_target,
-				],
-				'ip'      => [
+				),
+				'ip'      => array(
 					'sanitized' => $sanitized_ip,
 					'diff'      => array_diff( $given_ip, $sanitized_ip ),
-				],
-			];
+				),
+			);
 			if ( ! empty( $errors['referer']['diff'] )
 				|| ! empty( $errors['referer']['invalid'] )
 				|| ! empty( $errors['target']['diff'] )
diff --git a/views/settings-page.php b/views/settings-page.php
index e4c6404..46ce8d0 100755
--- a/views/settings-page.php
+++ b/views/settings-page.php
@@ -33,7 +33,7 @@ if ( ! empty( $_POST['statifyblacklist'] ) ) {
 			$referer_str = sanitize_textarea_field( wp_unslash( $_POST['statifyblacklist']['referer']['blacklist'] ) );
 		}
 		if ( empty( trim( $referer_str ) ) ) {
-			$referer = [];
+			$referer = array();
 		} else {
 			$referer = array_filter(
 				array_map(
@@ -53,7 +53,7 @@ if ( ! empty( $_POST['statifyblacklist'] ) ) {
 			$target_str = sanitize_textarea_field( wp_unslash( $_POST['statifyblacklist']['target']['blacklist'] ) );
 		}
 		if ( empty( trim( $target_str ) ) ) {
-			$target = [];
+			$target = array();
 		} else {
 			$target = array_filter(
 				array_map(
@@ -73,7 +73,7 @@ if ( ! empty( $_POST['statifyblacklist'] ) ) {
 			$ip_str = sanitize_textarea_field( wp_unslash( $_POST['statifyblacklist']['ip']['blacklist'] ) );
 		}
 		if ( empty( trim( $ip_str ) ) ) {
-			$ip = [];
+			$ip = array();
 		} else {
 			$ip = array_filter(
 				array_map(
@@ -90,8 +90,8 @@ if ( ! empty( $_POST['statifyblacklist'] ) ) {
 
 		// Update options (data will be sanitized).
 		$statifyblacklist_update_result = StatifyBlacklist_Admin::update_options(
-			[
-				'referer' => [
+			array(
+				'referer' => array(
 					'active'    => isset( $_POST['statifyblacklist']['referer']['active'] )
 						? (int) $_POST['statifyblacklist']['referer']['active'] : 0,
 					'cron'      => isset( $_POST['statifyblacklist']['referer']['cron'] )
@@ -99,8 +99,8 @@ if ( ! empty( $_POST['statifyblacklist'] ) ) {
 					'regexp'    => isset( $_POST['statifyblacklist']['referer']['regexp'] )
 						? (int) $_POST['statifyblacklist']['referer']['regexp'] : 0,
 					'blacklist' => array_flip( $referer ),
-				],
-				'target'  => [
+				),
+				'target'  => array(
 					'active'    => isset( $_POST['statifyblacklist']['target']['active'] )
 						? (int) $_POST['statifyblacklist']['target']['active'] : 0,
 					'cron'      => isset( $_POST['statifyblacklist']['target']['cron'] )
@@ -108,19 +108,19 @@ if ( ! empty( $_POST['statifyblacklist'] ) ) {
 					'regexp'    => isset( $_POST['statifyblacklist']['target']['regexp'] )
 						? (int) $_POST['statifyblacklist']['target']['regexp'] : 0,
 					'blacklist' => array_flip( $target ),
-				],
-				'ip'      => [
+				),
+				'ip'      => array(
 					'active'    => isset( $_POST['statifyblacklist']['ip']['active'] )
 						? (int) $_POST['statifyblacklist']['ip']['active'] : 0,
 					'blacklist' => $ip,
-				],
+				),
 				'version' => StatifyBlacklist::VERSION_MAIN,
-			]
+			)
 		);
 
 		// Generate messages.
 		if ( false !== $statifyblacklist_update_result ) {
-			$statifyblacklist_post_warning = [];
+			$statifyblacklist_post_warning = array();
 			if ( ! empty( $statifyblacklist_update_result['referer']['diff'] ) ) {
 				$statifyblacklist_post_warning[] = __( 'Some URLs are invalid and have been sanitized.', 'statify-blacklist' );
 			}
@@ -156,7 +156,7 @@ if ( ! empty( $_POST['statifyblacklist'] ) ) {
 	if ( isset( $statifyblacklist_post_warning ) ) {
 		foreach ( $statifyblacklist_post_warning as $w ) {
 			print '<div class="notice notice-warning"><p>' .
-				wp_kses( $w, [ 'br' => [] ] ) .
+				wp_kses( $w, array( 'br' => array() ) ) .
 				'</p></div>';
 		}
 		print '<div class="notice notice-warning"><p>' . esc_html( 'Settings have not been saved yet.', 'statify-blacklist' ) . '</p></div>';