diff --git a/content/editions/2026-07-03/index.md b/content/editions/2026-07-03/index.md
index 687dd1b..43ef546 100644
--- a/content/editions/2026-07-03/index.md
+++ b/content/editions/2026-07-03/index.md
@@ -1,6 +1,6 @@
 ---
 layout: edition
-volume_number: I
+volume: I
 edition_number: 1
 date: 2026-07-03
 status: published
diff --git a/content/editions/2026-07-04/index.md b/content/editions/2026-07-04/index.md
index 0c91bfa..2649df2 100644
--- a/content/editions/2026-07-04/index.md
+++ b/content/editions/2026-07-04/index.md
@@ -1,6 +1,6 @@
 ---
 layout: edition
-volume_number: I
+volume: I
 edition_number: 2
 date: 2026-07-04
 status: published