diff --git a/README.md b/README.md
index 00c0d40..c3d4f34 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,7 @@
 ```shell
 sudo apt-get install \
 	build-essential \
+	pkg-config \
 	checkinstall \
 	git \
 	autoconf \
@@ -123,4 +124,4 @@
 ideviceinstaller is an independent software application and has not been
 authorized, sponsored or otherwise approved by Apple Inc.
 
-README Updated on: 2020-06-13
+README Updated on: 2022-04-04