diff --git a/composer.json b/composer.json
index 6f0e1a6..22969e4 100644
--- a/composer.json
+++ b/composer.json
@@ -28,8 +28,8 @@
         "imliam/laravel-blade-helper": "^1.0"
     },
     "require-dev": {
-        "orchestra/testbench": "^6.9",
-        "nunomaduro/larastan": "^0.6.10",
+        "orchestra/testbench": "^6.23",
+        "nunomaduro/larastan": "^1.0",
         "pestphp/pest": "^1.2",
         "pestphp/pest-plugin-laravel": "^1.0",
         "intervention/image": "^2.7"
diff --git a/phpstan.neon b/phpstan.neon
index f586106..a04c137 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -10,11 +10,9 @@ parameters:
     universalObjectCratesClasses:
         - Illuminate\Routing\Route
         - ArchTech\SEO\SEOManager
+    checkMissingIterableValueType: false
 
     ignoreErrors:
-        - '#SEOManager\|array\|string\|null#'
-        - '#string\|false given#'
-        - '#flipp\(\) should return#'
-        - '#\_\_set\(\) has no return typehint specified#'
-
-    checkMissingIterableValueType: false
+        # Waiting for https://github.com/phpstan/phpstan/issues/5706
+        - '#^Cannot call method (flipp|get|set)\(\) on ArchTech\\SEO\\SEOManager\|array\|string\|null\.$#'
+        - '#^Method ArchTech\\SEO\\SEOManager::flipp\(\) should return static\(ArchTech\\SEO\\SEOManager\)\|string but returns array\|string\|null\.$#'
diff --git a/src/SEOManager.php b/src/SEOManager.php
index 33c855e..cbd8fd4 100644
--- a/src/SEOManager.php
+++ b/src/SEOManager.php
@@ -82,11 +82,14 @@ class SEOManager
             : value($this->values[$key]);
     }
 
-    /** Set one or more values. */
+    /**
+     * Set one or more values.
+     *
+     * @param string|array<string, string> $key
+     */
     public function set(string|array $key, string|Closure|null $value = null): string|array|null
     {
         if (is_array($key)) {
-            /** @var array<string, string> $key */
             foreach ($key as $k => $v) {
                 $this->set($k, $v);
             }
@@ -166,7 +169,7 @@ class SEOManager
             ];
         }
 
-        $query = base64_encode(json_encode($data));
+        $query = base64_encode(json_encode($data, JSON_THROW_ON_ERROR));
 
         /** @var string $template */
         $template = $this->meta("flipp.templates.$alias");
@@ -220,7 +223,7 @@ class SEOManager
      * Get or set metadata.
      * @param string|array $key The key or key-value pair being set.
      * @param string|array|null $value The value (if a single key is provided).
-     * @return $this|string
+     * @return $this|string|null
      */
     public function meta(string|array $key, string|array $value = null): mixed
     {
@@ -281,7 +284,11 @@ class SEOManager
         return $this->get(Str::snake($key, '.'));
     }
 
-    /** Handle magic set. */
+    /**
+     * Handle magic set.
+     *
+     * @return string|array|null
+     */
     public function __set(string $key, string $value)
     {
         return $this->set(Str::snake($key, '.'), $value);