1 files changed, 5 insertions, 0 deletions

diff --git a/README.md b/README.md
index 526560b..1fba442 100644
--- a/README.md
+++ b/README.md
@@ -43,3 +43,8 @@ How to make your own
 --------------------
 
 Copy `sample.opml` to a new file and edit to include your own set of feeds!
+
+References
+----------
+
+* For the OPML spec, check http://dev.opml.org