diff --git a/bip-???-cat.mediawiki b/bip-0347.mediawiki
similarity index 99%
rename from bip-???-cat.mediawiki
rename to bip-0347.mediawiki
index d7746fe4..f85b2e9f 100644
--- a/bip-???-cat.mediawiki
+++ b/bip-0347.mediawiki
@@ -1,5 +1,5 @@
 <pre>
-  BIP: ?
+  BIP: 347
   Layer: Consensus (soft fork)
   Title: OP_CAT
   Author: Ethan Heilman <ethan.r.heilman@gmail.com>