diff --git a/Repositories/otago_eprints3/otago_eprints/cfg/cfg.d/document_upload.pl b/Repositories/otago_eprints3/otago_eprints/cfg/cfg.d/document_upload.pl
index eec525a..380a6ed 100755
--- a/Repositories/otago_eprints3/otago_eprints/cfg/cfg.d/document_upload.pl
+++ b/Repositories/otago_eprints3/otago_eprints/cfg/cfg.d/document_upload.pl
@@ -92,9 +92,9 @@
 		return "application/application/vnd.ms-excel" if $suffix eq "csv";
 		
 		# Office XML document types.
-		return "application/application/vnd.ms-excel" if $suffix eq "xlsx";
-		return "application/vnd.ms-powerpoint" if $suffix eq "pptx";
-		return "application/msword" if $suffix eq "docx";
+		return "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" if $suffix eq "xlsx";
+		return "application/vnd.openxmlformats-officedocument.presentationml.presentation" if $suffix eq "pptx";
+		return "application/vnd.openxmlformats-officedocument.wordprocessingml.document" if $suffix eq "docx";
 		
 		# LaTeX
 		return "application/x-latex" if $suffix eq "tex";