diff --git a/tor-llcrypto/src/lib.rs b/tor-llcrypto/src/lib.rs
index 46f85444b..48e1f7863 100644
--- a/tor-llcrypto/src/lib.rs
+++ b/tor-llcrypto/src/lib.rs
@@ -9,10 +9,6 @@
 //! Encryption is implemented in `cipher`, digests are in `d`, and
 //! public key cryptography (including signatures, encryption, and key
 //! agreement) are in `pk`.
-//!
-//! When possible, everything here should be accessed via traits.
-//! We're using traits from the rust-crypto project, as
-//! re-exported from the traits module.
 
 // TODO -- the long-term intention here is that this functionality
 // should be replaceable at compile time with other implementations.
@@ -20,4 +16,3 @@
 pub mod cipher;
 pub mod d;
 pub mod pk;
-pub mod traits;
diff --git a/tor-llcrypto/src/pk/keymanip.rs b/tor-llcrypto/src/pk/keymanip.rs
index 98bb333a1..22f2c38f6 100644
--- a/tor-llcrypto/src/pk/keymanip.rs
+++ b/tor-llcrypto/src/pk/keymanip.rs
@@ -1,5 +1,5 @@
 use crate::pk;
-use crate::traits::Digest;
+use digest::Digest;
 use zeroize::Zeroizing;
 
 /// Convert a curve25519 public key (with sign bit) to an ed25519
diff --git a/tor-llcrypto/src/pk/rsa.rs b/tor-llcrypto/src/pk/rsa.rs
index 5cc0ffe28..0a2eda508 100644
--- a/tor-llcrypto/src/pk/rsa.rs
+++ b/tor-llcrypto/src/pk/rsa.rs
@@ -141,7 +141,7 @@ impl PublicKey {
     /// Compute the RSAIdentity for this public key.
     pub fn to_rsa_identity(&self) -> RSAIdentity {
         use crate::d::Sha1;
-        use crate::traits::Digest;
+        use digest::Digest;
         let id = Sha1::digest(&self.to_der()).into();
         RSAIdentity { id }
     }
diff --git a/tor-llcrypto/src/traits.rs b/tor-llcrypto/src/traits.rs
deleted file mode 100644
index 434ffa92f..000000000
--- a/tor-llcrypto/src/traits.rs
+++ /dev/null
@@ -1,4 +0,0 @@
-//! Re-export the traits that we expect other code to use.
-
-pub use digest::Digest;
-pub use stream_cipher::{NewStreamCipher, StreamCipher};
diff --git a/tor-llcrypto/tests/testvec.rs b/tor-llcrypto/tests/testvec.rs
index 0b36736bb..4fc43dc8a 100644
--- a/tor-llcrypto/tests/testvec.rs
+++ b/tor-llcrypto/tests/testvec.rs
@@ -1,4 +1,6 @@
+use digest::Digest;
 use hex_literal::hex;
+use stream_cipher::{NewStreamCipher, StreamCipher};
 use tor_llcrypto as ll;
 
 #[test]
@@ -124,7 +126,6 @@ fn tv_aes128_ctr() {
     // From NIST Special Publication 800-38A.
     // https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38a.pdf
     use ll::cipher::aes::Aes128Ctr;
-    use ll::traits::{NewStreamCipher, StreamCipher};
 
     let k1 = hex!("2b7e151628aed2a6abf7158809cf4f3c").into();
     let ctr1 = hex!("f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff").into();
@@ -156,7 +157,6 @@ fn tv_aes256_ctr() {
     // https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38a.pdf
 
     use ll::cipher::aes::Aes256Ctr;
-    use ll::traits::{NewStreamCipher, StreamCipher};
 
     let k1 = hex!(
         "603deb1015ca71be2b73aef0857d7781
@@ -190,7 +190,6 @@ fn tv_aes256_ctr() {
 fn tv_sha1() {
     // From RFC 3174, extracted from the example C code.
     use ll::d::Sha1;
-    use ll::traits::Digest;
 
     fn run_test(inp: &[u8], repeatcount: usize, expect: &[u8]) {
         let mut d = Sha1::new();
diff --git a/tor-netdoc/Cargo.toml b/tor-netdoc/Cargo.toml
index f60331d4d..6ed64210d 100644
--- a/tor-netdoc/Cargo.toml
+++ b/tor-netdoc/Cargo.toml
@@ -11,6 +11,7 @@ tor-llcrypto = { path="../tor-llcrypto", version="*" }
 tor-cert = { path="../tor-cert", version="*" }
 tor-protover = { path="../tor-protover", version= "*" }
 
+digest = "*"
 phf = { version = "*", features = ["macros"] }
 hex = "*"
 lazy_static = "*"
diff --git a/tor-netdoc/src/routerdesc.rs b/tor-netdoc/src/routerdesc.rs
index 564fc1090..db1fb4585 100644
--- a/tor-netdoc/src/routerdesc.rs
+++ b/tor-netdoc/src/routerdesc.rs
@@ -12,7 +12,7 @@ use std::{net, time};
 use tor_llcrypto as ll;
 use tor_llcrypto::pk::rsa::RSAIdentity;
 
-use ll::traits::Digest;
+use digest::Digest;
 
 pub struct RouterDesc {
     nickname: String,
diff --git a/tor-proto/Cargo.toml b/tor-proto/Cargo.toml
index 71a8a33c3..f49546dee 100644
--- a/tor-proto/Cargo.toml
+++ b/tor-proto/Cargo.toml
@@ -11,18 +11,18 @@ tor-llcrypto = { path="../tor-llcrypto" }
 tor-bytes = { path="../tor-bytes" }
 
 arrayref = "*"
-rand = "*"
 digest = "*"
+rand = "*"
 typenum = "*"
 # XXXX why did I have to downgrade?
 generic-array = "0.12"
-stream-cipher = "*"
 rand_core = "*"
 crypto-mac = "*"
 hmac = "*"
 hkdf = "*"
 zeroize = "*"
-subtle = "2.2.2"
+subtle = "*"
+stream-cipher = "*"
 
 [dev-dependencies]
 hex-literal = "*"