diff --git a/frontend/document/pdfdocument.lua b/frontend/document/pdfdocument.lua
index 6736a573c..c5ec7f667 100644
--- a/frontend/document/pdfdocument.lua
+++ b/frontend/document/pdfdocument.lua
@@ -288,6 +288,7 @@ function PdfDocument:register(registry)
     registry:addProvider("cbt", "application/vnd.comicbook+tar", self, 100)
     registry:addProvider("cbz", "application/vnd.comicbook+zip", self, 100)
     registry:addProvider("epub", "application/epub+zip", self, 50)
+    registry:addProvider("epub3", "application/epub+zip", self, 50)
     registry:addProvider("fb2", "application/fb2", self, 80)
     registry:addProvider("htm", "text/html", self, 90)
     registry:addProvider("html", "text/html", self, 90)