diff --git a/id-match-spec.md b/id-match-spec.adoc
similarity index 99%
rename from id-match-spec.md
rename to id-match-spec.adoc
index f55049d..4709833 100644
--- a/id-match-spec.md
+++ b/id-match-spec.adoc
@@ -1,11 +1,11 @@
 = ID Match API
 
+ifdef::env-github]
+
 :toc:
 :toc-placement!:
 
-Here is my preamble paragraph, but I could really place the TOC anywhere! Lorem ipsum foo bar baz.
-
-toc::[]
+endif::[]
 
 = About ID Match