diff --git a/secret_loader/__init__.py b/secret_loader/__init__.py
index 2d42bcc..007a12e 100644
--- a/secret_loader/__init__.py
+++ b/secret_loader/__init__.py
@@ -27,7 +27,9 @@ Secret loading order:
 
 ## TODO
 
-- [ ] Mlock secrets to prevent leakage to swap file.
+- [ ] Avoid leakage to swap files.
+    * Possibly Mlock? [Does not seem to work](https://stackoverflow.com/questions/29524020/prevent-ram-from-paging-to-swap-area-mlock)
+    * Alternatively use [mmap](https://docs.python.org/3/library/mmap.html) and [memoryview](https://stackoverflow.com/questions/18655648/what-exactly-is-the-point-of-memoryview-in-python)?§
 - [ ] Wrap secrets in intelligent strings:
     * Instead of returning None on unloaded, return UnknownSecret, that produce
       error when formatted.