diff --git a/README.md b/README.md
index 612180c..b3723c4 100644
--- a/README.md
+++ b/README.md
@@ -74,6 +74,13 @@ Invalid AGROVOC (cg.coverage.country): KENYAA
 - Reporting / summary
 - Better logging, for example with INFO, WARN, and ERR levels
 - Verbose, debug, or quiet options
+- Warn if an author is shorter than 3 characters?
+- Validate dc.rights field against SPDX? Perhaps with an option like `-m spdx` to enable the spdx module?
+- Validate DOIs? Normalize to https://doi.org format? Or use just the DOI part: 10.1016/j.worlddev.2010.06.006
+- Warn if two items use the same file in `filename` column
+- Add an option to drop invalid AGROVOC subjects?
+- Add check for author names with incorrect spacing after commas, ie "Orth,Alan S."
+- Add tests for application invocation, ie `tests/test_app.py`?
 
 ## License
 This work is licensed under the [GPLv3](https://www.gnu.org/licenses/gpl-3.0.en.html).