diff --git a/includes/class-activitypub.php b/includes/class-activitypub.php
index c0695a9..6e79fa6 100644
--- a/includes/class-activitypub.php
+++ b/includes/class-activitypub.php
@@ -78,7 +78,7 @@ class Activitypub {
 			\in_array( 'application/ld+json', $accept, true ) ||
 			\in_array( 'application/json', $accept, true )
 		) {
-			$secure_mode = \get_option( 'activitypub_use_secure_mode', '0' );
+			$secure_mode = (bool) \get_option( 'activitypub_use_secure_mode', '0' );
 			if ( $secure_mode ) {
 				$verification = Signature::verify_http_signature( $_SERVER );
 				if ( \is_wp_error( $verification ) ) {
diff --git a/includes/rest/class-server.php b/includes/rest/class-server.php
index 8deac10..712a3af 100644
--- a/includes/rest/class-server.php
+++ b/includes/rest/class-server.php
@@ -92,7 +92,7 @@ class Server {
 		} else {
 			if ( '/activitypub/1.0/webfinger' !== $route ) {
 				// SecureMode/Authorized fetch.
-				$secure_mode = \get_option( 'activitypub_use_secure_mode', '0' );
+				$secure_mode = (bool) \get_option( 'activitypub_use_secure_mode', '0' );
 				if ( $secure_mode ) {
 					$verified_request = Signature::verify_http_signature( $request );
 					if ( \is_wp_error( $verified_request ) ) {