diff --git a/Cargo.toml b/Cargo.toml
index 122ccd5..cfa5350 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ license = "AGPL-3.0-only"
 authors = ["Jan Christian Grünhage <jan.christian@gruenhage.xyz>"]
 repository = "https://git.jcg.re/jcgruenhage/peshming"
 keywords = ["ping", "icmp", "prometheus"]
-edition = "2018"
+edition = "2021"
 description = "Pings configured hosts in a configurable intervals and exposes metrics for prometheus."
 build = "build.rs"