diff --git a/repository/Grafoscopio/GrafoscopioNotebook.class.st b/repository/Grafoscopio/GrafoscopioNotebook.class.st
index 0b0336c..85f7aa2 100644
--- a/repository/Grafoscopio/GrafoscopioNotebook.class.st
+++ b/repository/Grafoscopio/GrafoscopioNotebook.class.st
@@ -225,7 +225,7 @@ GrafoscopioNotebook >> exportAsPDF [
 	pandocCommand := 'cd ', self markdownFile parent fullName,'; ',
 		'pandoc ', self pandocOptionsComputed, ' ',
 		self markdownFile fullName, ' -o ', self pdfFile fullName.
-	ExternalUnixOSProcess command: pandocCommand.
+	ExternalOSProcess command: pandocCommand.
 	self inform: ('File exported as: ', String cr, self pdfFile fullName)
 ]