diff --git a/inc/Data/Driver/HttpDriver.php b/inc/Data/Driver/HttpDriver.php
index 022fcbab..989b47ae 100644
--- a/inc/Data/Driver/HttpDriver.php
+++ b/inc/Data/Driver/HttpDriver.php
@@ -8,7 +8,7 @@ defined('TINYBOARD') or exit;
  * Honestly this is just a wrapper for cURL. Still useful to mock it and have an OOP API on PHP 7.
  */
 class HttpDriver {
-	private mixed $inner;
+	private $inner;
 	private int $timeout;
 	private int $max_file_size;
 
@@ -98,7 +98,7 @@ class HttpDriver {
 	 * @return bool Returns true on success, false if the file was too large.
 	 * @throws RuntimeException Throws on IO error.
 	 */
-	public function requestGetInto(string $endpoint, ?array $data, mixed $fd, int $timeout = 0): bool {
+	public function requestGetInto(string $endpoint, ?array $data, $fd, int $timeout = 0): bool {
 		if (!empty($data)) {
 			$endpoint .= '?' . \http_build_query($data);
 		}
diff --git a/inc/bans.php b/inc/bans.php
index 58b054ec..b09abda1 100644
--- a/inc/bans.php
+++ b/inc/bans.php
@@ -37,7 +37,7 @@ class Bans {
 		}
 	}
 
-	static private function findSingleAutoGc(string $ip, int $ban_id, bool $require_ban_view): array|null {
+	static private function findSingleAutoGc(string $ip, int $ban_id, bool $require_ban_view) {
 		// Use OR in the query to also garbage collect bans.
 		$query = prepare(
 			'SELECT ``bans``.* FROM ``bans``
@@ -70,7 +70,7 @@ class Bans {
 		return $found_ban;
 	}
 
-	static private function findSingleNoGc(int $ban_id): array|null {
+	static private function findSingleNoGc(int $ban_id) {
 		$query = prepare(
 			'SELECT ``bans``.* FROM ``bans``
 			 WHERE ``bans``.id = :id
@@ -94,7 +94,7 @@ class Bans {
 		}
 	}
 
-	static private function findAutoGc(?string $ip, string|false $board, bool $get_mod_info, bool $require_ban_view, ?int $ban_id): array {
+	static private function findAutoGc(?string $ip, $board, bool $get_mod_info, bool $require_ban_view, ?int $ban_id): array {
 		$query = prepare('SELECT ``bans``.*' . ($get_mod_info ? ', `username`' : '') . ' FROM ``bans``
 		' . ($get_mod_info ? 'LEFT JOIN ``mods`` ON ``mods``.`id` = `creator`' : '') . '
 		WHERE
@@ -130,7 +130,7 @@ class Bans {
 		return $ban_list;
 	}
 
-	static private function findNoGc(?string $ip, string|false $board, bool $get_mod_info, ?int $ban_id): array {
+	static private function findNoGc(?string $ip, string $board, bool $get_mod_info, ?int $ban_id): array {
 		$query = prepare('SELECT ``bans``.*' . ($get_mod_info ? ', `username`' : '') . ' FROM ``bans``
 		' . ($get_mod_info ? 'LEFT JOIN ``mods`` ON ``mods``.`id` = `creator`' : '') . '
 		WHERE
@@ -268,7 +268,7 @@ class Bans {
 		return [$ipstart, $ipend];
 	}
 
-	static public function findSingle(string $ip, int $ban_id, bool $require_ban_view, bool $auto_gc): array|null {
+	static public function findSingle(string $ip, int $ban_id, bool $require_ban_view, bool $auto_gc) {
 		if ($auto_gc) {
 			return self::findSingleAutoGc($ip, $ban_id, $require_ban_view);
 		} else {
@@ -276,7 +276,7 @@ class Bans {
 		}
 	}
 
-	static public function find(?string $ip, string|false $board = false, bool $get_mod_info = false, ?int $ban_id = null, bool $auto_gc = true) {
+	static public function find(?string $ip, $board = false, bool $get_mod_info = false, ?int $ban_id = null, bool $auto_gc = true) {
 		global $config;
 
 		if ($auto_gc) {
diff --git a/inc/context.php b/inc/context.php
index 9e5caef0..e047a782 100644
--- a/inc/context.php
+++ b/inc/context.php
@@ -16,7 +16,7 @@ class Context {
 		$this->definitions = $definitions;
 	}
 
-	public function get(string $name): mixed {
+	public function get(string $name){
 		if (!isset($this->definitions[$name])) {
 			throw new \RuntimeException("Could not find a dependency named $name");
 		}
diff --git a/inc/mod/auth.php b/inc/mod/auth.php
index 43b5e8fc..311b9850 100644
--- a/inc/mod/auth.php
+++ b/inc/mod/auth.php
@@ -196,7 +196,7 @@ function modLog(string $action, ?string $_board = null): void {
 	}
 }
 
-function create_pm_header(): mixed {
+function create_pm_header() {
 	global $mod, $config;
 
 	if ($config['cache']['enabled'] && ($header = cache::get('pm_unread_' . $mod['id'])) != false) {