diff --git a/sube/Cargo.toml b/sube/Cargo.toml
index 37ce4c0..7aa7f1a 100644
--- a/sube/Cargo.toml
+++ b/sube/Cargo.toml
@@ -39,7 +39,7 @@ async-std = { version = "1.11.0", default_features = false, optional = true }
 paste = { version = "1.0", optional = true }
 wasm-bindgen = { version = "0.2.91", optional = true }
 once_cell = { version = "1.17.1", optional = true }
-heapless = { version = "0.7.16", optional = true }
+heapless = { version = "0.8.0", optional = true }
 anyhow = { version = "1.0.40", optional = true }
 rand_core = {version = "0.6.3", optional = true }
 ewebsock = { git = "https://github.com/S0c5/ewebsock.git", optional = true, branch = "enhacement/aviod-blocking-operations-with-mpsc-futures" }
@@ -52,7 +52,7 @@ libwallet = { path = "../libwallet", default_features=false, features=["substrat
 rand_core = "0.6.3"
 
 [features]
-default = ["v14"]
+default = ["v14", "dep:heapless"]
 test = ["std", "wss", "ws", "http", "json", "v14", "dep:async-std"]
 http = ["dep:jsonrpc", "surf/h1-client-rustls"]
 http-web = ["dep:jsonrpc", "dep:wasm-bindgen", "surf/wasm-client"]