diff --git a/crates/tor-llcrypto/semver.md b/crates/tor-llcrypto/semver.md
new file mode 100644
index 000000000..98bfb1979
--- /dev/null
+++ b/crates/tor-llcrypto/semver.md
@@ -0,0 +1 @@
+MODIFIED: Signer trait now exposed.
diff --git a/crates/tor-llcrypto/src/pk/ed25519.rs b/crates/tor-llcrypto/src/pk/ed25519.rs
index 5a1277c0d..bacb59b81 100644
--- a/crates/tor-llcrypto/src/pk/ed25519.rs
+++ b/crates/tor-llcrypto/src/pk/ed25519.rs
@@ -13,7 +13,7 @@ use arrayref::array_ref;
 use std::fmt::{self, Debug, Display, Formatter};
 use subtle::{Choice, ConstantTimeEq};
 
-pub use ed25519_dalek::{ExpandedSecretKey, Keypair, PublicKey, SecretKey, Signature};
+pub use ed25519_dalek::{ExpandedSecretKey, Keypair, PublicKey, SecretKey, Signature, Signer};
 
 /// A relay's identity, as an unchecked, unvalidated Ed25519 key.
 ///