diff --git a/README.md b/README.md
index 00bc043..0c810f0 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,9 @@
 
 Quick bash script to register a new TOTP client with Okta, based on the QR code provided by Okta.
 
+# Requirements
+ - [bashtools](https://git.nethack.net/rob/bashtools)
+
 # Screenshots
 
 ![example](https://www.nethack.net/software/okta_totp/okta_totp.png "example")