diff --git a/src/Stringy.php b/src/Stringy.php
index e3c98aa..f7b600b 100644
--- a/src/Stringy.php
+++ b/src/Stringy.php
@@ -2509,14 +2509,11 @@ public function isWhitespace(): bool
      * EXAMPLE: <code>
      * </code>
      *
-     * @noinspection ReturnTypeCanBeDeclaredInspection
-     *
      * @psalm-mutation-free
      *
      * @return string The current value of the $str property
      */
-    #[\ReturnTypeWillChange]
-    public function jsonSerialize()
+    public function jsonSerialize(): mixed
     {
         return (string) $this;
     }
@@ -3113,8 +3110,7 @@ public function offsetGet($offset): string
      *
      * @return void
      */
-    #[\ReturnTypeWillChange]
-    public function offsetSet($offset, $value)
+    public function offsetSet($offset, $value): void
     {
         // Stringy is immutable, cannot directly set char
         throw new \Exception('Stringy object is immutable, cannot modify char');
@@ -3134,8 +3130,7 @@ public function offsetSet($offset, $value)
      *
      * @return void
      */
-    #[\ReturnTypeWillChange]
-    public function offsetUnset($offset)
+    public function offsetUnset($offset): void
     {
         // Don't allow directly modifying the string
         throw new \Exception('Stringy object is immutable, cannot unset char');