diff --git a/docs/systems.md b/docs/systems.md
index 7a170f1e2..26ea7ab7f 100644
--- a/docs/systems.md
+++ b/docs/systems.md
@@ -72,7 +72,8 @@ Vega is the EuroHPC JU supercomputer hosted by [the Institute for Information Sc
 
 #### SURF
 
-* Snellius: [General documentation](https://servicedesk.surf.nl/wiki/display/WIKI/Snellius) | [EESSI @ Snellius](https://servicedesk.surf.nl/wiki/display/WIKI/RC+component+EESSI+Client)
+* Snellius: [General documentation](https://servicedesk.surf.nl/wiki/display/WIKI/Snellius) | [EESSI @ Snellius](https://servicedesk.surf.nl/wiki/display/WIKI/EESSI+software+environment)
+* Spider: [General documentation](https://doc.spider.surfsara.nl/en/latest/index.html) | [EESSI @ Spider](https://doc.spider.surfsara.nl/en/latest/Pages/software/eessi.html)
 * Research Cloud: [General documentation](https://servicedesk.surf.nl/wiki/display/WIKI/SURF+Research+Cloud) | [EESSI @ Research Cloud](https://servicedesk.surf.nl/wiki/display/WIKI/RC+component+EESSI+Client)
 
 #### University of Groningen