diff --git a/msg_socket/Cargo.toml b/msg_socket/Cargo.toml
index 0ce17b6365..da95b8598b 100644
--- a/msg_socket/Cargo.toml
+++ b/msg_socket/Cargo.toml
@@ -2,6 +2,7 @@
 name = "msg_socket"
 version = "0.1.0"
 authors = ["The Chromium OS Authors"]
+edition = "2018"
 
 [dependencies]
 msg_on_socket_derive = { path = "msg_on_socket_derive" }
diff --git a/msg_socket/msg_on_socket_derive/Cargo.toml b/msg_socket/msg_on_socket_derive/Cargo.toml
index f8b7e8ab99..08d581a6f1 100644
--- a/msg_socket/msg_on_socket_derive/Cargo.toml
+++ b/msg_socket/msg_on_socket_derive/Cargo.toml
@@ -2,6 +2,7 @@
 name = "msg_on_socket_derive"
 version = "0.1.0"
 authors = ["The Chromium OS Authors"]
+edition = "2018"
 
 [dependencies]
 syn = "=0.15"