diff --git a/ci/date-check/Cargo.toml b/ci/date-check/Cargo.toml
index 95251fb1..884f485f 100644
--- a/ci/date-check/Cargo.toml
+++ b/ci/date-check/Cargo.toml
@@ -2,7 +2,7 @@
 name = "date-check"
 version = "0.1.0"
 authors = ["Camelid <camelidcamel@gmail.com>"]
-edition = "2018"
+edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html