diff --git a/04/title.txt b/04/title.txt
new file mode 100644
index 0000000..e861eb2
--- /dev/null
+++ b/04/title.txt
@@ -0,0 +1 @@
+Kapitulo 4
\ No newline at end of file
diff --git a/manifest.json b/manifest.json
index fa8d5ae..d88c1a4 100644
--- a/manifest.json
+++ b/manifest.json
@@ -83,6 +83,8 @@
 		"03-12",
 		"03-14",
 		"03-16",
-		"03-18"
+		"03-18",
+		"03-21",
+		"04-title"
 	]
 }
\ No newline at end of file