diff --git a/.phpstan.neon b/.phpstan.neon
index 8b7e85a..e4fa0be 100644
--- a/.phpstan.neon
+++ b/.phpstan.neon
@@ -15,11 +15,6 @@ parameters:
 		- vendor
 
 	ignoreErrors:
-		-
-			message: "#^Class Art4\\\\JsonApiClient\\\\Helper\\\\AccessKey extends generic class SplStack but does not specify its types\\: TValue$#"
-			count: 1
-			path: src/Helper/AccessKey.php
-
 		-
 			message: "#^Property Art4\\\\JsonApiClient\\\\V1\\\\ResourceNull\\:\\:\\$data is never read, only written\\.$#"
 			count: 1
diff --git a/src/Helper/AccessKey.php b/src/Helper/AccessKey.php
index a57558f..b647d9a 100644
--- a/src/Helper/AccessKey.php
+++ b/src/Helper/AccessKey.php
@@ -13,6 +13,8 @@
 /**
  * AccessKey
  *
+ * @extends SplStack<string>
+ *
  * @internal
  */
 final class AccessKey extends SplStack