diff --git a/Envelope_3/doc_tex/Envelope_3/main.tex b/Envelope_3/doc_tex/Envelope_3/main.tex
index 8b13c8b41be..e75123c543a 100644
--- a/Envelope_3/doc_tex/Envelope_3/main.tex
+++ b/Envelope_3/doc_tex/Envelope_3/main.tex
@@ -8,7 +8,7 @@
 
 \label{chapterEnvelope_3}
 \ccChapterRelease{\EnvelopeRev. \ \EnvelopeDate}
-\ccChapterAuthor{Michal Meyerovitch, Ron Wein, and Baruch Zukerman}
+\ccChapterAuthor{Dan Halperin, Michal Meyerovitch, Ron Wein, and Baruch Zukerman}
 
 \minitoc
 
diff --git a/Envelope_3/doc_tex/Envelope_3_ref/intro.tex b/Envelope_3/doc_tex/Envelope_3_ref/intro.tex
index fd0c953e863..23640507c3b 100644
--- a/Envelope_3/doc_tex/Envelope_3_ref/intro.tex
+++ b/Envelope_3/doc_tex/Envelope_3_ref/intro.tex
@@ -3,7 +3,7 @@
 \ccRefChapter{Envelopes of Surfaces in 3D\label{chapterEnvelope_3_ref}}
 % \clearpage
 \ccChapterRelease{\EnvelopeRefRev. \ \EnvelopeRefDate}
-\ccChapterAuthor{Michal Meyerovitch, Ron Wein and Baruch Zukerman}
+\ccChapterAuthor{Dan Halperin, Michal Meyerovitch, Ron Wein and Baruch Zukerman}
 
 % ===============================================================
 \section*{Introduction}