diff --git a/public/static/pdf/web/viewer.html b/public/static/pdf/web/viewer.html
index 320221196..58d7aab8e 100644
--- a/public/static/pdf/web/viewer.html
+++ b/public/static/pdf/web/viewer.html
@@ -33,6 +33,9 @@ See https://github.com/adobe-type-tools/cmap-resources