diff --git a/juniper_codegen/Cargo.toml b/juniper_codegen/Cargo.toml
index 9dbe2590..59ebb2e0 100644
--- a/juniper_codegen/Cargo.toml
+++ b/juniper_codegen/Cargo.toml
@@ -15,7 +15,7 @@ edition = "2018"
 proc-macro = true
 
 [features]
-async = []
+async = ["juniper/async"]
 
 [dependencies]
 proc-macro2 = "1.0.1"
@@ -25,6 +25,7 @@ proc-macro-error = "0.3.4"
 
 [dev-dependencies]
 juniper = { version = "0.14.2", path = "../juniper" }
+futures = { version = "=0.3.1" }
 
 [badges]
 travis-ci = { repository = "graphql-rust/juniper" }