diff --git a/matrix_sdk/Cargo.toml b/matrix_sdk/Cargo.toml
index 645c4a25..46372aa4 100644
--- a/matrix_sdk/Cargo.toml
+++ b/matrix_sdk/Cargo.toml
@@ -68,7 +68,7 @@ features = ["wasm-bindgen"]
 
 [dev-dependencies]
 async-trait = "0.1.40"
-async-std = { version = "*", features = ["unstable"] }
+async-std = { version = "1.6.5", features = ["unstable"] }
 dirs = "3.0.1"
 matrix-sdk-test = { version = "0.1.0", path = "../matrix_sdk_test" }
 tokio = { version = "0.2.22", features = ["rt-threaded", "macros"] }