diff --git a/cats.md b/cats.md
index 0d04d5206..1af24d66f 100644
--- a/cats.md
+++ b/cats.md
@@ -4,4 +4,5 @@
   - [[pull]] [[cat]].
 - a [[poll]].
   - https://twitter.com/mechanical_monk/status/1461765427214929927
+- #go https://www.loc.gov/free-to-use/cats/