diff --git a/preface.asciidoc b/preface.asciidoc
index d89b5e11..86746458 100644
--- a/preface.asciidoc
+++ b/preface.asciidoc
@@ -220,6 +220,7 @@ The following is a list of notable GitHub contributors:
 * genjix
 * Geremia
 * Gerry Smith (Hermetic)
+* gmr81
 * Gregory Trubetskoy (grisha)
 * Gus (netpoe)
 * halseth