diff --git a/ch23_vim_packages.md b/ch23_vim_packages.md
index b9566ae..c071e64 100644
--- a/ch23_vim_packages.md
+++ b/ch23_vim_packages.md
@@ -1,4 +1,4 @@
-# Ch21. Vim Packages
+# Ch23. Vim Packages
 
 In the previous chapter, I mentioned using an external plugin manager to install plugins. Since version 8, Vim comes with its own built-in plugin manager called *packages*. In this chapter, you will learn how to use Vim packages to install plugins.