1
2---
3 Cargo.toml | 1 +
4 1 file changed, 1 insertion(+)
5
6diff --git b/Cargo.toml a/Cargo.toml
7index 1f5472d0..ca63f5b5 100644
8--- b/Cargo.toml
9+++ a/Cargo.toml
10@@ -46,6 +46,7 @@ version = "1.8.0"
11 optional = true
12
13 [dev-dependencies]
14+futures = "0.3.21"
15
16 [features]
17 default = ["std"]
18