diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,7 +1,6 @@
 # mpc-lookup
 
-Lookup objects in the MPCORB database by their designation
-
-Learn more at https://mpc-lookup.lsst.io
+Lookup objects in the MPCORB database by their designation, after correcting a
+systematic error in the DP0.3 designation strings
 
 mpc-lookup is developed with [FastAPI](https://fastapi.tiangolo.com) and [Safir](https://safir.lsst.io).