diff --git a/CHANGELOG.md b/CHANGELOG.md
index a693da787..ae6305b88 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 # Changelog Fab-manager
 
 - Fix a bug: in some cases, unable to export to excel files
+- Fix a security issue: updated rack to 2.2.6.4 to fix [CVE-2023-27539](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-27539)
 
 ## v5.9.0 2023 March 20