diff --git a/composer.json b/composer.json
index 73caf14..924f924 100644
--- a/composer.json
+++ b/composer.json
@@ -28,6 +28,6 @@
     "require-dev": {
         "phpunit/phpunit": "^9.5",
         "squizlabs/php_codesniffer": "1.*",
-        "vimeo/psalm": "^4.5.1"
+        "vimeo/psalm": "^4.6.2"
     }
 }
diff --git a/src/Enum.php b/src/Enum.php
index a16aa23..6967ab5 100644
--- a/src/Enum.php
+++ b/src/Enum.php
@@ -69,15 +69,25 @@ public function __construct($value)
             $value = $value->getValue();
         }
 
+        /** @psalm-suppress ImplicitToStringCast assertValidValueReturningKey returns always a string but psalm has currently an issue here */
         $this->key = static::assertValidValueReturningKey($value);
 
         /** @psalm-var T */
         $this->value = $value;
     }
 
+    /**
+     * This method exists only for the compatibility reason when deserializing a previously serialized version
+     * that didn't had the key property
+     */
     public function __wakeup()
     {
+        /** @psalm-suppress DocblockTypeContradiction key can be null when deserializing an enum without the key */
         if ($this->key === null) {
+            /**
+             * @psalm-suppress InaccessibleProperty key is not readonly as marked by psalm
+             * @psalm-suppress PossiblyFalsePropertyAssignmentValue deserializing a case that was removed
+             */
             $this->key = static::search($this->value);
         }
     }
@@ -215,6 +225,7 @@ public static function isValid($value)
      *
      * @psalm-pure
      * @psalm-assert T $value
+     * @param mixed $value
      */
     public static function assertValidValue($value): void
     {
@@ -226,6 +237,8 @@ public static function assertValidValue($value): void
      *
      * @psalm-pure
      * @psalm-assert T $value
+     * @param mixed $value
+     * @return string
      */
     private static function assertValidValueReturningKey($value): string
     {