diff --git a/Cargo.toml b/Cargo.toml
index a98ac03..78afb24 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,6 +2,7 @@
 name = "rdupe"
 version = "0.1.0"
 authors = ["Benoît Mauduit <bmauduit@beneth.fr>"]
+edition = "2018"
 
 [dependencies]
 clap = "*"