diff --git a/Cargo.toml b/Cargo.toml
index d2817478514c1ca1dd2ddc05e72c1532ada68359..d271d16e16bd0c6ad81823292cf96880b9831c3c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,13 +9,18 @@ description = """
 Rust wrapper for dice.
 """
 
+[features]
+default = ["nostd"]
+nostd = ["mbedtls/no_std_deps"]
+std = ["mbedtls/std"]
+
 [lib]
-name = "dice"
+name = "rust_dice"
 
 [dependencies]
 cty = "0.2"
-mbedtls-sys = { version="2.28.13", package="mbedtls-sys-auto-smx", default-features = false, optional = false }
-mbedtls = { version="0.13.4", package = "mbedtls-smx", default-features = false, features = ["std"] }
+mbedtls-sys = { version="2.28.14", package="mbedtls-sys-auto-smx", default-features = false, optional = false }
+mbedtls = { version="0.13.5", package = "mbedtls-smx", default-features = false}
 
 [build-dependencies]
 bindgen = "0.72"
diff --git a/src/lib.rs b/src/lib.rs
index 0a9754533ab60b1429209ffb3598e6f163bce2ee..15d589e52b293a87084233852fb0e673ccda9701 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,6 +1,8 @@
+#![cfg_attr(not(feature = "std"), no_std)]
 extern crate cty;
-
+#[cfg(feature = "std")]
 mod mbedtls_sm2dsa;
+#[cfg(feature = "std")]
 pub use mbedtls_sm2dsa::{sm2_keypair_from_seed,sm2_sign, sm2_verify};
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]