diff --git a/README.md b/README.md
index 53f6e17..64fdf0d 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # LWReg: a lightweight chemical registration system
 
+The preprint of the application note describing `lwreg` is here: https://doi.org/10.26434/chemrxiv-2024-zrfl9 
+
 This provides a basic registration system which can be used either as a python
 library or via a command-line interface.
 
@@ -228,4 +230,4 @@ Here's the SQL to create the conformers table in sqlite when `registerConformers
 ```
 create table conformers (conf_id integer primary key, molregno integer not null, 
                    conformer_hash text not null unique, molblock text);
-```
\ No newline at end of file
+```