diff --git a/tokio-async-await/Cargo.toml b/tokio-async-await/Cargo.toml
index 50eee67d268..645d37c33f7 100644
--- a/tokio-async-await/Cargo.toml
+++ b/tokio-async-await/Cargo.toml
@@ -13,6 +13,7 @@ description = """
 Experimental async/await support for Tokio
 """
 categories = ["asynchronous"]
+edition = "2018"
 
 [features]
 # This feature comes with no promise of stability. Things will