diff --git a/readme.md b/readme.md
index 45b40cdb7..1ab54de6e 100644
--- a/readme.md
+++ b/readme.md
@@ -199,4 +199,5 @@ These are the great open-source projects used to help build BookStack:
 * [League/Flysystem](https://flysystem.thephpleague.com)
 * [StyleCI](https://styleci.io/)
 * [pragmarx/google2fa](https://github.com/antonioribeiro/google2fa)
-* [Bacon/BaconQrCode](https://github.com/Bacon/BaconQrCode)
\ No newline at end of file
+* [Bacon/BaconQrCode](https://github.com/Bacon/BaconQrCode)
+* [phpseclib](https://github.com/phpseclib/phpseclib)
\ No newline at end of file