diff --git a/spec/book.typ b/spec/book.typ
index 5bf498b49..57363ee23 100644
--- a/spec/book.typ
+++ b/spec/book.typ
@@ -145,7 +145,7 @@
         } else {
           rf.supplement
         }
-        [#supplement#numbering(fig.numbering, ..counter.at(lbl))]
+        [#supplement #numbering(fig.numbering, ..counter.at(lbl))]
       }
       cross-link("/" + ch, reference: shiroa-label, link-content)
     }
@@ -183,6 +183,11 @@
           xref-include(key)
         }).join()
         #metadata(json("interaction_count.json").sum(default: (:)))<interaction_count>
+
+        #let chapter-index = meta_sections.position(x => x.at(0) == file) + 1
+        #set heading(numbering: (..args) => [#chapter-index.#numbering("1.1", ..args)])
+        #counter(heading).update(0)
+
         #body
       ])
     }
diff --git a/spec/logup.typ b/spec/logup.typ
index 7bb9a085d..038d67a8c 100644
--- a/spec/logup.typ
+++ b/spec/logup.typ
@@ -1,7 +1,6 @@
 #import "/book.typ": book-page, aside, cdsg
 
 #show: book-page("logup")
-#set heading(numbering: "1.")
 #show link: underline
 
 #show "constraint choice": link(<constraint_choices>)[constraint choice]