Migrate to 2018 edition.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/ser.rs b/src/ser.rs
index 60e5b50..2dcd962 100644
--- a/src/ser.rs
+++ b/src/ser.rs
@@ -32,7 +32,7 @@ use std::fmt::{self, Write};
 use std::marker;
 use std::rc::Rc;
 
-use datetime;
+use crate::datetime;
 use serde::ser;
 
 /// Serialize the given data structure as a TOML byte vector.