diff --git a/juniper_codegen/Cargo.toml b/juniper_codegen/Cargo.toml
index fead5166..41c0cacd 100644
--- a/juniper_codegen/Cargo.toml
+++ b/juniper_codegen/Cargo.toml
@@ -15,17 +15,17 @@ edition = "2018"
 proc-macro = true
 
 [features]
-async = []
+async = ["futures"]
 
 [dependencies]
 proc-macro2 = "1.0.1"
 syn = { version = "1.0.3", features = ["full", "extra-traits", "parsing"] }
 quote = "1.0.2"
 proc-macro-error = "0.3.4"
+futures = { version = "0.3.1", optional = true }
 
 [dev-dependencies]
 juniper = { version = "0.14.2", path = "../juniper", features = ["async"] }
-futures = { version = "0.3.1" }
 
 [badges]
 travis-ci = { repository = "graphql-rust/juniper" }