diff --git a/cfg/conf.sample.php b/cfg/conf.sample.php
index 141888f2..b128bf48 100644
--- a/cfg/conf.sample.php
+++ b/cfg/conf.sample.php
@@ -37,9 +37,12 @@ defaultformatter = "plaintext"
 ; size limit per paste or comment in bytes, defaults to 10 Mebibytes
 sizelimit = 10485760
 
-; template to include, default is "bootstrap" (tpl/bootstrap.php)
-; Also available is a dark version ("bootstrap-dark",) and
-; a theme that resembles the classic ZeroBin style ("page".)
+; template to include, default is "bootstrap" (tpl/bootstrap.php), also
+; available are "page" (tpl/page.php), the classic ZeroBin style and several
+; bootstrap variants: "bootstrap-dark", "bootstrap-compact", "bootstrap-page",
+; which can be combined with "-dark" and "-compact" for "bootstrap-dark-page"
+; and finally "bootstrap-compact-page" - previews at:
+; https://privatebin.info/screenshots.html
 template = "bootstrap"
 
 ; (optional) info text to display
@@ -242,7 +245,7 @@ dir = PATH "data"
 ; - AWS_ACCESS_KEY_ID
 ; - AWS_SECRET_ACCESS_KEY
 ; - AWS_SESSION_TOKEN (if needed)
-; for more details, see https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/guide_credentials.html#default-credential-chain 
+; for more details, see https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/guide_credentials.html#default-credential-chain
 ;class = S3Storage
 ;[model_options]
 ;region = "eu-central-1"
@@ -264,4 +267,4 @@ dir = PATH "data"
 ; (optional) the "signature" (access key) issued by YOURLS for the using account
 ; signature = ""
 ; (optional) the URL of the YOURLS API, called to shorten a PrivateBin URL
-; apiurl = "https://yourls.example.com/yourls-api.php"
\ No newline at end of file
+; apiurl = "https://yourls.example.com/yourls-api.php"
diff --git a/composer.json b/composer.json
index bbd720ae..0d792ebf 100644
--- a/composer.json
+++ b/composer.json
@@ -30,8 +30,8 @@
 		"yzalis/identicon": "2.0.0"
 	},
 	"suggest" : {
-		"google/cloud-storage" : "1.32.0",
-		"aws/aws-sdk-php" : "3.275.1"
+		"google/cloud-storage" : "1.41.0",
+		"aws/aws-sdk-php" : "3.302.0"
 	},
 	"require-dev" : {
 		"phpunit/phpunit" : "^9"
diff --git a/doc/Installation.md b/doc/Installation.md
index 77f79fbb..b09de9e1 100644
--- a/doc/Installation.md
+++ b/doc/Installation.md
@@ -22,6 +22,7 @@ for more information.
 ### Minimal Requirements
 
 - PHP version 7.3 or above
+- ctype extension
 - GD extension (when using identicon or vizhash icons, jdenticon works without it)
 - zlib extension
 - some disk space or a database supported by [PDO](https://php.net/manual/book.pdo.php)
diff --git a/lib/Vizhash16x16.php b/lib/Vizhash16x16.php
index b61fd56b..2d296af8 100644
--- a/lib/Vizhash16x16.php
+++ b/lib/Vizhash16x16.php
@@ -109,9 +109,9 @@ class Vizhash16x16
         for ($i = 0; $i < 7; ++$i) {
             $action = $this->getInt();
             $color  = imagecolorallocate($image, $r, $g, $b);
-            $r      = $r0      = ($r0 + $this->getInt() / 25) % 256;
-            $g      = $g0      = ($g0 + $this->getInt() / 25) % 256;
-            $b      = $b0      = ($b0 + $this->getInt() / 25) % 256;
+            $r      = $r0      = ((int) $r0 + $this->getInt() / 25) % 256;
+            $g      = $g0      = ((int) $g0 + $this->getInt() / 25) % 256;
+            $b      = $b0      = ((int) $b0 + $this->getInt() / 25) % 256;
             $this->drawshape($image, $action, $color);
         }
 
@@ -136,7 +136,7 @@ class Vizhash16x16
     {
         $v = $this->VALUES[$this->VALUES_INDEX];
         ++$this->VALUES_INDEX;
-        $this->VALUES_INDEX %= count($this->VALUES); // Warp around the array
+        $this->VALUES_INDEX %= count($this->VALUES); // Wrap around the array
         return $v;
     }
 
@@ -148,7 +148,7 @@ class Vizhash16x16
      */
     private function getX()
     {
-        return $this->width * $this->getInt() / 256;
+        return (int) $this->width * $this->getInt() / 256;
     }
 
     /**
@@ -159,7 +159,7 @@ class Vizhash16x16
      */
     private function getY()
     {
-        return $this->height * $this->getInt() / 256;
+        return (int) $this->height * $this->getInt() / 256;
     }
 
     /**
@@ -190,9 +190,9 @@ class Vizhash16x16
             ($color2[2] - $color1[2]) / $size,
         );
         for ($i = 0; $i < $size; ++$i) {
-            $r = $color1[0] + ($diffs[0] * $i);
-            $g = $color1[1] + ($diffs[1] * $i);
-            $b = $color1[2] + ($diffs[2] * $i);
+            $r = $color1[0] + ((int) $diffs[0] * $i);
+            $g = $color1[1] + ((int) $diffs[1] * $i);
+            $b = $color1[2] + ((int) $diffs[2] * $i);
             if ($direction == 'h') {
                 imageline($img, $i, 0, $i, $sizeinv, imagecolorallocate($img, $r, $g, $b));
             } else {
@@ -222,7 +222,7 @@ class Vizhash16x16
                 break;
             case 3:
                 $points = array($this->getX(), $this->getY(), $this->getX(), $this->getY(), $this->getX(), $this->getY(), $this->getX(), $this->getY());
-                imagefilledpolygon($image, $points, 4, $color);
+                version_compare(PHP_VERSION, '8.1', '<') ? imagefilledpolygon($image, $points, 4, $color) : imagefilledpolygon($image, $points, $color);
                 break;
             default:
                 $start = $this->getInt() * 360 / 256;
diff --git a/tst/Bootstrap.php b/tst/Bootstrap.php
index 7f4caa32..183d1b1d 100644
--- a/tst/Bootstrap.php
+++ b/tst/Bootstrap.php
@@ -508,6 +508,11 @@ class ConnectionInterfaceStub implements ConnectionInterface
         throw new BadMethodCallException('not supported by this stub');
     }
 
+    public function restoreObject(array $args = array())
+    {
+        throw new BadMethodCallException('not supported by this stub');
+    }
+
     public function copyObject(array $args = array())
     {
         throw new BadMethodCallException('not supported by this stub');