diff --git a/.travis.yml b/.travis.yml
index 9b4749a9..b4fcd505 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,8 @@ install:
   - composer install --ignore-platform-reqs
 
 php:
+  - 8.0
+  - 8.1
   - nightly
 
 script:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 21bb4913..b5e0a904 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## Version 5.3
+* Updated to support PHP 8.1
+
 ## Version 5.2
 * Updated PHP requirement to 8
 
diff --git a/app/templates/manga-cover.php b/app/templates/manga-cover.php
index feb646bc..fbb0f3a3 100644
--- a/app/templates/manga-cover.php
+++ b/app/templates/manga-cover.php
@@ -2,7 +2,6 @@
 	<?php if ($auth->isAuthenticated()): ?>
 		<div class="edit-buttons" hidden>
 			<button class="plus-one-chapter">+1 Chapter</button>
-			<?php /* <button class="plus-one-volume">+1 Volume</button> */ ?>
 		</div>
 	<?php endif ?>
 	<?= $helper->picture("images/manga/{$item['manga']['id']}.webp") ?>
@@ -64,11 +63,6 @@
 				Chapters: <span class="chapters_read"><?= $item['chapters']['read'] ?></span> /
 				<span class="chapter_count"><?= $item['chapters']['total'] ?></span>
 			</div>
-			<?php /* </div>
-						<div class="row"> */ ?>
-			<div class="volume_completion">
-				Volumes: <span class="volume_count"><?= $item['volumes']['total'] ?></span>
-			</div>
 		</div>
 	</div>
 </article>
\ No newline at end of file
diff --git a/app/views/manga/edit.php b/app/views/manga/edit.php
index 58eb076c..7180b471 100644
--- a/app/views/manga/edit.php
+++ b/app/views/manga/edit.php
@@ -46,13 +46,6 @@
 							   value="<?= $item['chapters']['read'] ?>"/> / <?= $item['chapters']['total'] ?>
 					</td>
 				</tr>
-				<tr>
-					<td><label for="volumes_read">Volumes Read</label></td>
-					<td>
-						<?php /*<input type="number" disabled="disabled" min="0" name="volumes_read" id="volumes_read" value="" /> */ ?>
-						- / <?= $item['volumes']['total'] ?>
-					</td>
-				</tr>
 				<tr>
 					<td><label for="rereading_flag">Rereading?</label></td>
 					<td>
diff --git a/app/views/manga/list.php b/app/views/manga/list.php
index ffcb53f7..45b5b543 100644
--- a/app/views/manga/list.php
+++ b/app/views/manga/list.php
@@ -22,7 +22,6 @@
 					<th>Title</th>
 					<th>Rating</th>
 					<th>Completed Chapters</th>
-					<th># of Volumes</th>
 					<th>Attributes</th>
 					<th>Type</th>
 				</tr>
@@ -49,7 +48,6 @@
 					</td>
 					<td><?= $item['user_rating'] ?> / 10</td>
 					<td><?= $item['chapters']['read'] ?> / <?= $item['chapters']['total'] ?></td>
-					<td><?= $item['volumes']['total'] ?></td>
 					<td>
 	                    <ul>
 						<?php if ($item['reread'] == 1): ?>
diff --git a/index.php b/index.php
index efb78c5a..e5b904c1 100644
--- a/index.php
+++ b/index.php
@@ -25,7 +25,7 @@ setlocale(LC_CTYPE, 'en_US');
 // Load composer autoloader
 require_once __DIR__ . '/vendor/autoload.php';
 
-Debugger::$strictMode = true;
+Debugger::$strictMode = E_ALL & ~E_DEPRECATED & ~E_USER_DEPRECATED; // all errors except deprecated notices
 Debugger::$showBar = false;
 Debugger::enable(Debugger::DEVELOPMENT, __DIR__ . '/app/logs');
 
diff --git a/src/AnimeClient/API/APIRequestBuilder.php b/src/AnimeClient/API/APIRequestBuilder.php
index 00bcffa5..2e98620d 100644
--- a/src/AnimeClient/API/APIRequestBuilder.php
+++ b/src/AnimeClient/API/APIRequestBuilder.php
@@ -318,7 +318,7 @@ abstract class APIRequestBuilder {
 	 * @param string $type
 	 * @return void
 	 */
-	private function resetState(?string $url, $type = 'GET'): void
+	private function resetState(?string $url, string $type = 'GET'): void
 	{
 		$requestUrl = $url ?: $this->baseUrl;
 
diff --git a/src/AnimeClient/API/CacheTrait.php b/src/AnimeClient/API/CacheTrait.php
index c8726a78..22ecc210 100644
--- a/src/AnimeClient/API/CacheTrait.php
+++ b/src/AnimeClient/API/CacheTrait.php
@@ -33,7 +33,7 @@ trait CacheTrait {
 	 * Inject the cache object
 	 *
 	 * @param CacheInterface $cache
-	 * @return $this
+	 * @return self
 	 */
 	public function setCache(CacheInterface $cache): self
 	{
diff --git a/src/AnimeClient/API/Kitsu/Auth.php b/src/AnimeClient/API/Kitsu/Auth.php
index 0d0b5c5e..045433d7 100644
--- a/src/AnimeClient/API/Kitsu/Auth.php
+++ b/src/AnimeClient/API/Kitsu/Auth.php
@@ -123,7 +123,7 @@ final class Auth {
 	/**
 	 * Retrieve the authentication token from the session
 	 *
-	 * @return string
+	 * @return string|null
 	 */
 	public function getAuthToken(): ?string
 	{
diff --git a/src/AnimeClient/API/Kitsu/Transformer/AnimeTransformer.php b/src/AnimeClient/API/Kitsu/Transformer/AnimeTransformer.php
index 16ed9a29..76dddc97 100644
--- a/src/AnimeClient/API/Kitsu/Transformer/AnimeTransformer.php
+++ b/src/AnimeClient/API/Kitsu/Transformer/AnimeTransformer.php
@@ -90,7 +90,7 @@ final class AnimeTransformer extends AbstractTransformer {
 
 				// If this person object is so broken as to not have a proper image object,
 				// just skip it. No point in showing a role with nothing in it.
-				if ($person === null || $person['id'] === null || $person['image'] === null || $person['image']['original'] === null)
+				if ($person === null || $person['id'] === null || $person['image'] === null)
 				{
 					continue;
 				}
@@ -104,7 +104,7 @@ final class AnimeTransformer extends AbstractTransformer {
 					'id' => $person['id'],
 					'name' => $name,
 					'image' => [
-						'original' => $person['image']['original']['url'],
+						'original' => $person['image']['original']['url'] ?? '',
 					],
 					'slug' => $person['slug'],
 				];
diff --git a/src/AnimeClient/API/Kitsu/Transformer/CharacterTransformer.php b/src/AnimeClient/API/Kitsu/Transformer/CharacterTransformer.php
index 87cb5f9f..6f80bfcb 100644
--- a/src/AnimeClient/API/Kitsu/Transformer/CharacterTransformer.php
+++ b/src/AnimeClient/API/Kitsu/Transformer/CharacterTransformer.php
@@ -105,7 +105,7 @@ final class CharacterTransformer extends AbstractTransformer {
 		];
 
 		// And now, reorganize voice actor relationships
-		$rawVoices = array_filter($data, fn($item) => count((array)$item['voices']['nodes']) > 0);
+		$rawVoices = array_filter($data, fn($item) => (! empty($item['voices'])) && count((array)$item['voices']['nodes']) > 0);
 
 		if (empty($rawVoices))
 		{
diff --git a/src/AnimeClient/API/Kitsu/Transformer/MangaTransformer.php b/src/AnimeClient/API/Kitsu/Transformer/MangaTransformer.php
index 7c01a4d6..a15fc4e9 100644
--- a/src/AnimeClient/API/Kitsu/Transformer/MangaTransformer.php
+++ b/src/AnimeClient/API/Kitsu/Transformer/MangaTransformer.php
@@ -21,7 +21,7 @@ use Aviat\AnimeClient\Types\MangaPage;
 use Aviat\Ion\Transformer\AbstractTransformer;
 
 /**
- * Transformer for anime description page
+ * Transformer for manga description page
  */
 final class MangaTransformer extends AbstractTransformer {
 
@@ -87,6 +87,13 @@ final class MangaTransformer extends AbstractTransformer {
 				$role = $staffing['role'];
 				$name = $person['names']['localized'][$person['names']['canonical']];
 
+				// If this person object is so broken as to not have a proper image object,
+				// just skip it. No point in showing a role with nothing in it.
+				if ($person === null || $person['id'] === null || $person['image'] === null)
+				{
+					continue;
+				}
+
 				if ( ! array_key_exists($role, $staff))
 				{
 					$staff[$role] = [];
@@ -97,7 +104,7 @@ final class MangaTransformer extends AbstractTransformer {
 					'slug' => $person['slug'],
 					'name' => $name,
 					'image' => [
-						'original' => $person['image']['original']['url'],
+						'original' => $person['image']['original']['url'] ?? '',
 					],
 				];
 
diff --git a/src/AnimeClient/API/Kitsu/Transformer/PersonTransformer.php b/src/AnimeClient/API/Kitsu/Transformer/PersonTransformer.php
index 16d235ab..71e387ea 100644
--- a/src/AnimeClient/API/Kitsu/Transformer/PersonTransformer.php
+++ b/src/AnimeClient/API/Kitsu/Transformer/PersonTransformer.php
@@ -69,6 +69,11 @@ final class PersonTransformer extends AbstractTransformer {
 
 			foreach ($data['mediaStaff']['nodes'] as $staffing)
 			{
+				if (empty($staffing['media']))
+				{
+					continue;
+				}
+
 				$media = $staffing['media'];
 				$role = $staffing['role'];
 				$title = $media['titles']['canonical'];
@@ -79,7 +84,7 @@ final class PersonTransformer extends AbstractTransformer {
 					'title' => $title,
 					'titles' => array_merge([$title], Kitsu::getFilteredTitles($media['titles'])),
 					'image' => [
-						'original' => $media['posterImage']['views'][1]['url'],
+						'original' => $media['posterImage']['views'][1]['url'] ?? '',
 					],
 					'slug' => $media['slug'],
 				];
@@ -120,7 +125,7 @@ final class PersonTransformer extends AbstractTransformer {
 							'id' => $character['id'],
 							'slug' => $character['slug'],
 							'image' => [
-								'original' => $character['image']['original']['url'],
+								'original' => $character['image']['original']['url'] ?? '',
 							],
 							'canonicalName' => $character['names']['canonical'],
 						],
diff --git a/src/AnimeClient/API/ParallelAPIRequest.php b/src/AnimeClient/API/ParallelAPIRequest.php
index 64374cab..e397c2a7 100644
--- a/src/AnimeClient/API/ParallelAPIRequest.php
+++ b/src/AnimeClient/API/ParallelAPIRequest.php
@@ -39,10 +39,10 @@ final class ParallelAPIRequest {
 	 * Add a request
 	 *
 	 * @param string|Request $request
-	 * @param string|number $key
+	 * @param string|int|null $key
 	 * @return self
 	 */
-	public function addRequest($request, $key = NULL): self
+	public function addRequest(string|Request $request, string|int|null $key = NULL): self
 	{
 		if ($key !== NULL)
 		{
diff --git a/src/AnimeClient/AnimeClient.php b/src/AnimeClient/AnimeClient.php
index 43518e15..3a612abd 100644
--- a/src/AnimeClient/AnimeClient.php
+++ b/src/AnimeClient/AnimeClient.php
@@ -335,7 +335,7 @@ function createPlaceholderImage (string $path, ?int $width, ?int $height, $text
 	$fontSize = 10;
 	$fontWidth = imagefontwidth($fontSize);
 	$fontHeight = imagefontheight($fontSize);
-	$length = \strlen($text);
+	$length = strlen($text);
 	$textWidth = $length * $fontWidth;
 	$fxPos = (int) ceil((imagesx($img) - $textWidth) / 2);
 	$fyPos = (int) ceil((imagesy($img) - $fontHeight) / 2);