diff --git a/index.md b/index.md
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+++ b/index.md
@@ -12,9 +12,9 @@ opensource basis by an interdisciplinary [team](people) of material
 scientists, geologists and mathematicians.
 
 ### News
+* MTEX Online Workshop 2021: ・ [Announcement](https://github.com/mtex-toolbox/mtex/discussions/519#discussioncomment-139964) ・ [Homepage](http://www-user.tu-chemnitz.de/~rahi/mtexWorkshop21) ・
 * MTEX 5.5.0 released: ・ [Download](https://github.com/mtex-toolbox/mtex/releases/download/mtex-5.5.0/mtex-5.5.0.zip) ・ [Release Notes](changelog.html) ・ [Installation](download) ・
 * MTEX GUI 2.4 by J. Hiscocks released: ・ [Download](https://www.researchgate.net/profile/Jessica_Hiscocks/publication/341722714_MTEX_GUI_3pt4-_An_updated_graphical_interface_for_MTEX/data/5ed1b00e299bf1c67d274ede/MTEX-GUI-3pt4.zip) ・ [Announcment](https://www.researchgate.net/publication/341722714_MTEX_GUI_3pt4-_An_updated_graphical_interface_for_MTEX) ・
-* Chemnitz MTEX Workshop 2020: ・ [Announcement](https://groups.google.com/forum/#!topic/mtexmail/-U5zoGb_olc) ・ [Homepage](http://www-user.tu-chemnitz.de/~rahi/mtexWorkshop20) ・  [Registration](http://www-user.tu-chemnitz.de/~rahi/mtexWorkshop20/registration.php) ・
 * New paper: [Gazing at crystal balls - electron backscatter diffraction indexing and cross correlation on the sphere](https://www-user.tu-chemnitz.de/~rahi/paper/gazingAtCrystalBalls.pdf)
 * New paper: [Denoising of Crystal Orientation Maps](https://www-user.tu-chemnitz.de/~rahi/paper/denoising.pdf)