diff --git a/Cargo.toml b/Cargo.toml
index 4fa2c4fba6ca3a3a5ea9a235a6beb6957abb6600..d2d7709d2ab9d885eb65bf4b8cf7c53293051c21 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,6 +16,7 @@ cortex-m-rtfm = "0.2.2"
 cortex-m = "0.3.1"
 rtfm-core = "0.1.0"
 cortex-m-semihosting = "0.2.0"
+heapless = "0.2.0"
 
 [dependencies.cortex-m-debug]
 version = "0.1.0"
@@ -34,9 +35,12 @@ version = "0.2.0"
 git = "https://github.com/jsjolund/f4"
 version = "0.1.0"
 
-[features]
-wcet_bkpt = [] 
-wcet_nop = [] 
+#[dev-dependencies.nb]
+#features = ["unstable"]
+#version = "0.1.1"
+
+[dependencies.nb]
+git = "https://github.com/japaric/nb"
 
 [profile.release]
 lto = true