diff --git a/01/title.txt b/01/title.txt
index 0924cb2..cf8f437 100644
--- a/01/title.txt
+++ b/01/title.txt
@@ -1 +1 @@
-Capitulo 1
\ No newline at end of file
+Capítulo 1
\ No newline at end of file
diff --git a/manifest.json b/manifest.json
index 6908ceb..68196e6 100644
--- a/manifest.json
+++ b/manifest.json
@@ -46,6 +46,7 @@
 		"01-11",
 		"01-13",
 		"01-15",
-		"01-18"
+		"01-18",
+		"01-21"
 	]
 }
\ No newline at end of file