diff --git a/doc/hcar/HCAR-hledger-201811.tex b/doc/hcar/HCAR-hledger-201811.tex
index 6ef231459..0282a04e8 100644
--- a/doc/hcar/HCAR-hledger-201811.tex
+++ b/doc/hcar/HCAR-hledger-201811.tex
@@ -22,7 +22,7 @@ Project activity has been continuous since our last update in November 2016.
 Some notable developments:
 
 \begin{compactitem}
-%% 20180518:
+%% https://www.haskell.org/communities/05-2018/html/report.html#hledger :
 %% \item The community has grown in size and activity. The number of committers has doubled, from 42 to 84.
 %% \item Website, documentation, CI and project infrastructure have been improved
 %% \item A cross-platform installer script has been added