diff --git a/CHANGELOG b/CHANGELOG
index 7c36c72a2..edd5eef3c 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -8,6 +8,7 @@
 - fixed setting group approvers from previous document version
 - very experimental support of memcached for accelerating some database
   operations (do not use in production)
+- prevent malicious manipulation of referer when setting language
 
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                      Changes in version 5.1.38