diff --git a/README.md b/README.md
index db3b642..c64807d 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,11 @@ republishes the advisories in the OSV format, and syncs them against the
 - [ ] Schema: Provide summary/details/severity
 - [ ] Schema: Provide SHA256 hashes under database_specific
 
+## Contributing
+
+Contributions are welcome! Since the advisories are automatically generated, please don't make
+manual updates to the JSON advisory files. Instead update the generation script: `generate.py`.
+
 ## License
 
 Licensed under the [MIT License](https://nemo.mit-license.org/). See LICENSE file for details.
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