diff --git a/04/title.txt b/04/title.txt
new file mode 100644
index 0000000..49a0847
--- /dev/null
+++ b/04/title.txt
@@ -0,0 +1 @@
+Chapter 4
\ No newline at end of file
diff --git a/manifest.json b/manifest.json
index 4f46d8b..f67bc93 100644
--- a/manifest.json
+++ b/manifest.json
@@ -88,6 +88,18 @@
 		"03-12",
 		"03-15",
 		"03-17",
+		"03-19",
+		"04-title",
+		"04-01",
+		"04-03",
+		"04-05",
+		"04-07",
+		"04-10",
+		"04-12",
+		"04-14",
+		"04-16",
+		"04-18",
+		"04-19",
 		"11-title",
 		"11-01",
 		"11-03",