diff --git a/Cargo.toml b/Cargo.toml
index 233f078..1154c22 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,5 +12,5 @@ categories = ["embedded", "no-std", "hardware-support"]
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-embedded-hal = "0.2.6"
+embedded-hal = { version = "0.2.6", features = ["unproven"] }
 nb = "1.0.0"