diff --git a/README.md b/README.md
index 4934777..30f6282 100644
--- a/README.md
+++ b/README.md
@@ -327,6 +327,7 @@ file.
     - Planned release date: 2024-12-10
     - Added bitwise string operators.
     - Emulate Perl behaviour with unsigned integers in bitwise operators.
+    - WIP: sockets; lvalue `substr`
     - Add support for concurrency and parallelism, such as threads and async/await.
     - Enhance security features, including sandboxing and input validation.
     - Increase test coverage and introduce automated testing tools.