diff --git a/preface.asciidoc b/preface.asciidoc
index fc93772..f46e903 100644
--- a/preface.asciidoc
+++ b/preface.asciidoc
@@ -183,6 +183,7 @@ Following is an alphabetically sorted list of all the GitHub contributors, inclu
 
 * Alpha Q. Smith (@alpha_github_id)
 * Omega X. Last (@omega_github_id)
+* Hatim Boufnichel (@boufni95)
 
 Without the help offered by everyone listed above, this book would not have been possible. Your contributions demonstrate the power of open source and open culture, and we are eternally grateful for your help.