--- a/rust/hg-core/Cargo.toml	Fri Jul 12 11:08:31 2019 +0200
+++ b/rust/hg-core/Cargo.toml	Tue Jul 02 17:15:03 2019 +0200
@@ -3,6 +3,7 @@
 version = "0.1.0"
 authors = ["Georges Racinet <gracinet@anybox.fr>"]
 description = "Mercurial pure Rust core library, with no assumption on Python bindings (FFI)"
+edition = "2018"
 
 [lib]
 name = "hg"