diff --git a/src/Model.php b/src/Model.php
index ff67cbe..7e30b0e 100755
--- a/src/Model.php
+++ b/src/Model.php
@@ -318,6 +318,7 @@ public function toArray()
      *
      * @return array
      */
+    #[\ReturnTypeWillChange]
     public function jsonSerialize()
     {
         return $this->toArray();
@@ -330,7 +331,7 @@ public function jsonSerialize()
      *
      * @return bool
      */
-    public function offsetExists($offset)
+    public function offsetExists($offset): bool
     {
         return !is_null($this->getAttribute($offset));
     }
@@ -342,6 +343,7 @@ public function offsetExists($offset)
      *
      * @return mixed
      */
+    #[\ReturnTypeWillChange]
     public function offsetGet($offset)
     {
         return $this->getAttribute($offset);
@@ -355,7 +357,7 @@ public function offsetGet($offset)
      *
      * @return void
      */
-    public function offsetSet($offset, $value)
+    public function offsetSet($offset, $value): void
     {
         $this->setAttribute($offset, $value);
     }
@@ -367,7 +369,7 @@ public function offsetSet($offset, $value)
      *
      * @return void
      */
-    public function offsetUnset($offset)
+    public function offsetUnset($offset): void
     {
         unset($this->attributes[$offset]);
     }