https for archive.apache.org
diff --git a/README.md b/README.md
index db648e3..00dd468 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@
### Previous releases
Releases 2015-2018 during incubation at Apache Software Foundation
-are available from the ASF Download Archive <http://archive.apache.org/dist/incubator/taverna/>
+are available from the ASF Download Archive <https://archive.apache.org/dist/incubator/taverna/>
Releases 2014 from the University of Manchester are on BitBucket <https://bitbucket.org/taverna/>
