diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/40.electromagnetism/10.n1/10.brainstorming/textbook.es.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/40.electromagnetism/10.n1/10.brainstorming/textbook.es.md
index 97535d628..ab6bff271 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/40.electromagnetism/10.n1/10.brainstorming/textbook.es.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/40.electromagnetism/10.n1/10.brainstorming/textbook.es.md
@@ -4,7 +4,7 @@ published: true
 routable: true
 visible: false
 lessons:
-    - slug: Estructuración-g12-electromagnetismo
+    - slug: estructuración-g12-electromagnetismo
       order: 2
 ---