diff --git a/Cargo.toml b/Cargo.toml
index 9f7e938..742fe0e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,7 +7,7 @@ license-file = "LICENSE"
 readme = "README.md"
 repository = "https://git.asonix.dog/asonix/ap-relay"
 keywords = ["activitypub", "relay"]
-edition = "2018"
+edition = "2021"
 build = "src/build.rs"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html