diff --git a/CHANGELOG b/CHANGELOG
index b001e24c4..fe07e2f5d 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,6 +2,7 @@
                      Changes in version 5.1.39
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 - show quota on chart page when listing total document size per user
+- turn off legend for chart sizepermonth
 
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                      Changes in version 5.1.38