diff --git a/util/Cargo.toml b/util/Cargo.toml
index d3c7268..046fba5 100644
--- a/util/Cargo.toml
+++ b/util/Cargo.toml
@@ -2,6 +2,7 @@
 name = "util"
 version = "0.1.0"
 authors = ["Sebastian Waisbrot <seppo0010@gmail.com>"]
+edition = "2021"
 
 [dependencies]
 time = "0.3"