diff --git a/README.md b/README.md
index 7a4cd74..812ab9e 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,7 @@
 ```shell
 sudo apt-get install \
 	build-essential \
+	pkg-config \
 	checkinstall \
 	git \
 	autoconf \
@@ -163,4 +164,4 @@
 This project is an independent software library and has not been authorized,
 sponsored, or otherwise approved by Apple Inc.
 
-README Updated on: 2021-08-30
+README Updated on: 2022-04-04