diff --git a/atlas.json b/atlas.json
index 7f8448b1..5391f3a4 100644
--- a/atlas.json
+++ b/atlas.json
@@ -12,6 +12,7 @@
     "ch05.asciidoc",
     "chapters/transactions.adoc",
     "chapters/authorization-authentication.adoc",
+    "chapters/signatures.adoc",
     "author_bio.html"
   ],
   "formats": {