diff --git a/src/sysroot.rs b/src/sysroot.rs
index 5d1d940..6735027 100644
--- a/src/sysroot.rs
+++ b/src/sysroot.rs
@@ -177,7 +177,7 @@ fn build_liballoc(
 authors = ["The Rust Project Developers"]
 name = "alloc"
 version = "0.0.0"
-edition = "2018"
+edition = "2021"
 
 [dependencies.compiler_builtins]
 version = "0.1.0"