diff --git a/Taskfile.yaml b/Taskfile.yaml
index 27293c5..bc6789e 100644
--- a/Taskfile.yaml
+++ b/Taskfile.yaml
@@ -12,6 +12,7 @@ tasks:
     dev: vite
     test: vitest run src
     test:watch: vitest src
+    story: histoire dev
     default:
         cmds:
             - echo "{{.GREETING}}"
diff --git a/src/lib/components/Battle.svelte b/src/lib/components/Battle.svelte
index 851561c..2aa87dd 100644
--- a/src/lib/components/Battle.svelte
+++ b/src/lib/components/Battle.svelte
@@ -145,7 +145,7 @@
 		additionalCharacters &&
 		R.difference(additionalCharacters.map(R.prop('selection')).flat());
 
-	let chapter = 1 + parseInt(params.battleId / 2);
+	$: chapter = 1 + parseInt((params.battleId - 1) / 2);
 	$: chapterBattle =
 		params.battleId >= 7
 			? params.battleId - 6