diff --git a/README.markdown b/README.markdown
index b986ca1c..61a0ec5d 100644
--- a/README.markdown
+++ b/README.markdown
@@ -26,7 +26,7 @@ The documentation is available on Gitbook and built from the [libsodium-doc](htt
 * [libsodium documentation](https://download.libsodium.org/doc/) -
 online, requires Javascript.
 * [offline documentation](https://www.gitbook.com/book/jedisct1/libsodium/details)
-in PDF, MOBI and ePUB formats.
+in PDF format.
 
 ## Integrity Checking