diff --git a/book.toml b/book.toml
index 9d6c896c9..348cad88e 100644
--- a/book.toml
+++ b/book.toml
@@ -1,7 +1,7 @@
 [book]
 
 title = "The Rust Reference"
-author = "The Rust Project Developers"
+authors = ["The Rust Project Developers"]
 
 [output.html]
 additional-css = ["theme/reference.css"]