diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 4a9a773e85ad96e1ac0185c488782f6951ca062b..8227297675eac5e2c0793ad9021fc4ed321a6cb2 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -4,6 +4,8 @@ Changes in Release 2.x
  * Use the newer voronota implementation as default in CAD-score binding
  * Added HHblits3 support - HHblits2 still supported but considered deprecated
  * HMMScore: HMM-HMM alignment score as it is optimized in HHblits searches
+ * Support for the new carbohydrate-extension in the mmCIF file format
+   (https://www.wwpdb.org/documentation/carbohydrate-remediation)
  * Several minor bug fixes and improvements.
 
 Changes in Release 2.0.0