diff --git a/Cargo.lock b/Cargo.lock
index 20c2d84..87535c5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -180,8 +180,8 @@ dependencies = [
  "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "libcryptsetup-sys 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ring 0.13.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "rpassword 4.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rust-crypto 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
  "structopt 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index 362be16..f1d9cb5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,7 +21,7 @@ libcryptsetup-sys = "0.1.2"
 
 
 hex = "0.3.2"
-rust-crypto = "0.2.36"
+ring = "0.13.5"
 failure = "0.1.5"
 rpassword = "4.0.1"
 structopt = "0.3.2"
diff --git a/src/config.rs b/src/config.rs
index 5dcabdb..eb06724 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -1,7 +1,6 @@
 use crate::error::*;
 use crate::*;
-use crypto::digest::Digest;
-use crypto::sha2::Sha256;
+use ring::digest;
 
 use std::fmt;
 use std::fs::File;
@@ -57,7 +56,7 @@ impl fmt::Display for InputSalt {
 
 impl InputSalt {
     pub fn obtain(&self, password_helper: &PasswordHelper) -> Fido2LuksResult<[u8; 32]> {
-        let mut digest = Sha256::new();
+        let mut digest = digest::Context::new(&digest::SHA256);
         match self {
             InputSalt::File { path } => {
                 let mut do_io = || {
@@ -65,7 +64,7 @@ impl InputSalt {
                     let mut buf = [0u8; 512];
                     loop {
                         let red = reader.read(&mut buf)?;
-                        digest.input(&buf[0..red]);
+                        digest.update(&buf[0..red]);
                         if red == 0 {
                             break;
                         }
@@ -75,12 +74,12 @@ impl InputSalt {
                 do_io().map_err(|cause| Fido2LuksError::KeyfileError { cause })?;
             }
             InputSalt::AskPassword => {
-                digest.input(password_helper.obtain()?.as_bytes());
+                digest.update(password_helper.obtain()?.as_bytes());
             }
-            InputSalt::String(s) => digest.input(s.as_bytes()),
+            InputSalt::String(s) => digest.update(s.as_bytes()),
         }
         let mut salt = [0u8; 32];
-        digest.result(&mut salt);
+        salt.as_mut().copy_from_slice(digest.finish().as_ref());
         Ok(salt)
     }
 }
diff --git a/src/main.rs b/src/main.rs
index 2295ba2..ac93d4b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -5,10 +5,9 @@ use crate::cli::*;
 use crate::config::*;
 use crate::device::*;
 use crate::error::*;
-use crypto::digest::Digest;
-use crypto::sha2::Sha256;
 use cryptsetup_rs as luks;
 use cryptsetup_rs::Luks1CryptDevice;
+use ring::digest;
 
 use std::io::{self};
 use std::path::PathBuf;
@@ -26,11 +25,11 @@ fn open_container(device: &PathBuf, name: &str, secret: &[u8; 32]) -> Fido2LuksR
 }
 
 fn assemble_secret(hmac_result: &[u8], salt: &[u8]) -> [u8; 32] {
-    let mut digest = Sha256::new();
-    digest.input(salt);
-    digest.input(hmac_result);
+    let mut digest = digest::Context::new(&digest::SHA256);
+    digest.update(salt);
+    digest.update(hmac_result);
     let mut secret = [0u8; 32];
-    digest.result(&mut secret);
+    secret.as_mut().copy_from_slice(digest.finish().as_ref());
     secret
 }