diff --git a/io_jail/Cargo.toml b/io_jail/Cargo.toml
index b09b0cfbde..5e7ca5d042 100644
--- a/io_jail/Cargo.toml
+++ b/io_jail/Cargo.toml
@@ -2,6 +2,7 @@
 name = "io_jail"
 version = "0.1.0"
 authors = ["The Chromium OS Authors"]
+edition = "2018"
 
 [dependencies]
 libc = "*"