diff --git a/Cargo.toml b/Cargo.toml
index 49dc320..30d6ed5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,10 +12,11 @@ description = "A flexible and secure key storage interface for working with cryp
 keywords = ["crypto", "storage", "keys", "signatures", "security"]
 
 [dependencies]
-anyhow = "1"
-thiserror = "2"
-async-trait = "0.1"
+thiserror = { version = "2", optional = true, default-features = false }
+async-trait = { version = "0.1", optional = true }
 
 [features]
-default = ["send-sync-storage"]
+default = ["std", "send-sync-storage"]
+std = ["thiserror/std", "async-trait"]
 send-sync-storage = []
+no-std = ["thiserror", "async-trait"]
diff --git a/src/error.rs b/src/error.rs
index 7fb2167..0a1d739 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -3,8 +3,21 @@
 
 use thiserror::Error;
 
-pub type Result<T, E = Error> = std::result::Result<T, E>;
+#[cfg(not(feature = "std"))]
+extern crate alloc;
 
+#[cfg(not(feature = "std"))]
+use alloc::boxed::Box;
+
+#[cfg(feature = "std")]
+use std::error::Error as StdError;
+
+#[cfg(not(feature = "std"))]
+use core::error::Error as CoreError;
+
+pub type Result<T, E = Error> = core::result::Result<T, E>;
+
+#[cfg(feature = "std")]
 #[derive(Debug, Error)]
 pub enum Error {
     #[error("key with ID {0} could not be found")]
@@ -14,5 +27,18 @@ pub enum Error {
     #[error("failed to generate key with provided options")]
     InvalidOptions,
     #[error(transparent)]
-    Other(anyhow::Error),
+    Other(Box<dyn StdError + Send + Sync>),
+}
+
+#[cfg(not(feature = "std"))]
+#[derive(Debug, Error)]
+pub enum Error {
+    #[error("key with ID {0} could not be found")]
+    KeyNotFound(alloc::string::String),
+    #[error("unable to communicate with key store: {0}")]
+    StoreDisconnected(alloc::string::String),
+    #[error("failed to generate key with provided options")]
+    InvalidOptions,
+    #[error(transparent)]
+    Other(Box<dyn CoreError + Send + Sync>),
 }
diff --git a/src/lib.rs b/src/lib.rs
index 39f6ffc..f0795f2 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,6 +1,14 @@
 // Copyright 2020-2024 IOTA Stiftung
 // SPDX-License-Identifier: Apache-2.0
 
+#![cfg_attr(not(feature = "std"), no_std)]
+
+#[cfg(feature = "std")]
+extern crate std;
+
+#[cfg(not(feature = "std"))]
+extern crate alloc;
+
 mod error;
 mod signature_scheme;
 mod signer;
diff --git a/src/signer.rs b/src/signer.rs
index faa7fcd..1488190 100644
--- a/src/signer.rs
+++ b/src/signer.rs
@@ -3,6 +3,9 @@
 
 use async_trait::async_trait;
 
+#[cfg(not(feature = "std"))]
+use alloc::boxed::Box;
+
 use crate::Result;
 use crate::SignatureScheme;
 
diff --git a/src/storage.rs b/src/storage.rs
index d84917e..72e9dc0 100644
--- a/src/storage.rs
+++ b/src/storage.rs
@@ -3,6 +3,9 @@
 
 use async_trait::async_trait;
 
+#[cfg(not(feature = "std"))]
+use alloc::boxed::Box;
+
 use crate::signature_scheme::SignatureScheme;
 use crate::signer::Signer;
 use crate::Result;