diff --git a/preface.asciidoc b/preface.asciidoc
index 47c9172f..b46ca616 100644
--- a/preface.asciidoc
+++ b/preface.asciidoc
@@ -183,6 +183,7 @@ Following is a list of notable GitHub contributors, including their GitHub ID in
 * Cragin Godley (cgodley)
 * Craig Dodd (cdodd)
 * dallyshalla
+* Dan Nolan (Dan-Nolan)
 * Darius Kramer (dkrmr)
 * David Huie (DavidHuie)
 * Diego Viola (diegoviola)
@@ -230,6 +231,7 @@ Following is a list of notable GitHub contributors, including their GitHub ID in
 * Maximilian Reichel (phramz)
 * Michalis Kargakis (kargakis)
 * Michael C. Ippolito (michaelcippolito)
+* Michael Newman (michaelbnewman)
 * Mihail Russu (MihailRussu)
 * Minh T. Nguyen (enderminh)
 * Nagaraj Hubli (nagarajhubli)