diff --git a/HowtoEdit.txt b/HowtoEdit.txt
index 000045f..78b04ed 100644
--- a/HowtoEdit.txt
+++ b/HowtoEdit.txt
@@ -40,5 +40,5 @@
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-http://roy.e.koeki-u.ac.jp/~yuuji/2012/seminar/hgrepos.html
+http://roy.e.koeki-u.ac.jp/~yuuji/2018/seminar/hgrepos.html
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