diff --git a/composer.json b/composer.json
index b9e275b..bc527c2 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
     }
   ],
   "require": {
-    "php": "^7.3|^8.0",
+    "php": "^8.0",
     "illuminate/support": "^8.0",
     "illuminate/console": "^8.0",
     "illuminate/cache": "^8.0"
diff --git a/src/Location.php b/src/Location.php
index 76b03ee..45b94c9 100644
--- a/src/Location.php
+++ b/src/Location.php
@@ -154,7 +154,7 @@ public function __set($key, $value)
      *
      * @return bool
      */
-    public function offsetExists($offset)
+    public function offsetExists(mixed $offset): bool
     {
         return isset($this->$offset);
     }
@@ -166,7 +166,7 @@ public function offsetExists($offset)
      *
      * @return mixed
      */
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset): mixed
     {
         return $this->$offset;
     }
@@ -179,7 +179,7 @@ public function offsetGet($offset)
      *
      * @return void
      */
-    public function offsetSet($offset, $value)
+    public function offsetSet(mixed $offset, mixed $value): void
     {
         $this->$offset = $value;
     }
@@ -191,7 +191,7 @@ public function offsetSet($offset, $value)
      *
      * @return void
      */
-    public function offsetUnset($offset)
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->$offset);
     }