diff --git a/tahoe-chk.cabal b/tahoe-chk.cabal
index 64ad9c149cae6c49751b43e6fa7942e642ab874c..bf1ebc738c5ba19f0f8d6cb993421091d99cded8 100644
--- a/tahoe-chk.cabal
+++ b/tahoe-chk.cabal
@@ -5,7 +5,9 @@ synopsis:
   The Tahoe-LAFS' Content-Hash-Key (CHK) cryptographic protocol.
 
 description:
-  Please see the README on GitHub at <https://whetstone.private.storage/privatestorage/tahoe-chk/-/blob/main/README.md>
+  Reversibly encrypt plaintext, encode ciphertext to shares, and serialize
+  shares to bytes such that confidentiality, integrity, and authenticity are
+  assured.
 
 homepage:           https://whetstone.private.storage/privatestorage/tahoe-chk
 bug-reports: