diff --git a/README.md b/README.md
index ca0d0b4..29eb510 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ Data files
 ----------
 
  * [ncov-s.fasta](ncov-s.fasta): the unprocessed RNA of the virus S protein
- * [vaccine-s.fasta](ncov-s.fasta): the unprocessed RNA of the vaccine S protein
+ * [vaccine-s.fasta](vaccine-s.fasta): the unprocessed RNA of the vaccine S protein
  * [side-by-side.csv](side-by-side.csv): the two files aligned, with virual and vaccine codons side by side