diff --git a/README.md b/README.md
index c547432..9742474 100755
--- a/README.md
+++ b/README.md
@@ -6,6 +6,11 @@ Collection of notes regarding instruments, configuration and general usage.
 This is mirrored on `/sf/cristallina/config/documentation`.
 
 ## Changelog for Cristallina computational issues
+- 26.09.2025
+  - updated RHEL on saresc-01, 02, 03, 04, 05, media-01.
+  - integrated upstream slic changes from Sven (only partially, there are more WIP items)
+  - postponed update of analysis_edge --> we should rebuilt this from scratch
+  - updated jupyter_alpha: jupyterlab 4.4.8 now, jupyter_collaboration from 4.0.2 to 4.11
 - 17.04.2025
   - the environment analysis_forge rebuilt with Sven's miniforge and now saved in /sf/cristallina/applications/it/envs. The aim is that this will be the default env and a new one analysis-stable lagging behind will be created later. Everything in the env updated and set to be gotten from conda-forge. paulscherrerinstitut packages are taken explicitly from there.
 - 02.07.2025