diff --git a/README.md b/README.md
index 8bf0029def332220cd4183ec05bed58282bf5557..72cc6a4645ec3d83e3e5cf6000445a74b068f20f 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ RCFS is a collection of source codes to study robotics through simple 2D example
 
 Check also the [PDF with the corresponding mathematical descriptions](./doc/rcfs.pdf).
 
-Additional reading material can be be found as [video lectures](https://tube.switch.ch/channels/e5e11e14?order=oldest-first) with [corresponding slides in PDF format](https://drive.switch.ch/index.php/s/PAn7xsA5CNQKzyo).
+Additional reading material can be found as [video lectures](https://tube.switch.ch/channels/e5e11e14?order=oldest-first) with [corresponding slides in PDF format](https://drive.switch.ch/index.php/s/PAn7xsA5CNQKzyo).
 
 
 ### Work in progress