--- a/Cargo.toml	Fri Dec 09 14:10:48 2022 +0200
+++ b/Cargo.toml	Sat Dec 10 16:22:38 2022 +0200
@@ -2,6 +2,7 @@
 name = "pointsource_algs"
 version = "1.0.0"
 edition = "2021"
+rust-version = "1.67"
 authors = ["Tuomo Valkonen <tuomov@iki.fi>"]
 description = "Algorithms for point source localisation"
 homepage = "https://tuomov.iki.fi/software/pointsource_algs/"