diff --git a/CHANGELOG b/CHANGELOG
index 745d2493b..91ecae04a 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -9,6 +9,7 @@
 - add hook displayPreviewThumb
 - add searching for mimetype in database
 - list of expired documents can be filtered by user
+- use quoted printable encoding instead of base64 for email subjects
 
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                      Changes in version 5.1.39