diff --git a/packages/grpc/src/Metadata/Timeout.php b/packages/grpc/src/Metadata/Timeout.php
index 6c248a9..0fe9084 100644
--- a/packages/grpc/src/Metadata/Timeout.php
+++ b/packages/grpc/src/Metadata/Timeout.php
@@ -128,7 +128,7 @@ public function __toString(): string
 }
 
 /**
- * @internal
+ * @api
  */
 function parseTimeout(Metadata $md): ?Timeout
 {