diff --git a/Cargo.toml b/Cargo.toml
index 98cb679..6ff8786 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,7 +3,7 @@ name = "micro_http"
 version = "0.1.0"
 license = "Apache-2.0"
 authors = ["Amazon Firecracker team <firecracker-devel@amazon.com>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 libc = "0.2.66"