diff --git a/acmed/src/acme_proto/jws.rs b/acmed/src/acme_proto/jws.rs
index 1928741..dda52bc 100644
--- a/acmed/src/acme_proto/jws.rs
+++ b/acmed/src/acme_proto/jws.rs
@@ -1,4 +1,4 @@
-use crate::acme_proto::jws::algorithms::{EdDsaVariant, SignatureAlgorithm};
+use crate::acme_proto::jws::algorithms::SignatureAlgorithm;
 use acme_common::b64_encode;
 use acme_common::crypto::{sha256, KeyPair};
 use acme_common::error::Error;
diff --git a/acmed/src/acme_proto/jws/algorithms.rs b/acmed/src/acme_proto/jws/algorithms.rs
index 78c20ab..aed4ffd 100644
--- a/acmed/src/acme_proto/jws/algorithms.rs
+++ b/acmed/src/acme_proto/jws/algorithms.rs
@@ -1,34 +1,18 @@
-use super::jwk::{EdDsaEd25519Jwk, Es256Jwk, Jwk};
+use super::jwk::{Es256Jwk, Jwk};
 use acme_common::crypto::{gen_keypair, KeyPair, KeyType};
 use acme_common::error::Error;
 use std::fmt;
 use std::str::FromStr;
 
-#[derive(Debug, PartialEq, Eq)]
-pub enum EdDsaVariant {
-    Ed25519,
-}
-
-impl fmt::Display for EdDsaVariant {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        let s = match self {
-            EdDsaVariant::Ed25519 => "Ed25519",
-        };
-        write!(f, "{}", s)
-    }
-}
-
 #[derive(Debug, PartialEq, Eq)]
 pub enum SignatureAlgorithm {
     Es256,
-    EdDsa(EdDsaVariant),
 }
 
 impl fmt::Display for SignatureAlgorithm {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         let s = match self {
             SignatureAlgorithm::Es256 => "ES256",
-            SignatureAlgorithm::EdDsa(_) => "EdDSA",
         };
         write!(f, "{}", s)
     }
@@ -40,7 +24,6 @@ impl FromStr for SignatureAlgorithm {
     fn from_str(data: &str) -> Result<Self, Self::Err> {
         match data.to_lowercase().as_str() {
             "es256" => Ok(SignatureAlgorithm::Es256),
-            "eddsa-ed25519" => Ok(SignatureAlgorithm::EdDsa(EdDsaVariant::Ed25519)),
             _ => Err(format!("{}: unknown signature algorithm", data).into()),
         }
     }
@@ -63,14 +46,13 @@ impl SignatureAlgorithm {
     pub fn gen_key_pair(&self) -> Result<KeyPair, Error> {
         match self {
             SignatureAlgorithm::Es256 => gen_keypair(KeyType::EcdsaP256),
-            SignatureAlgorithm::EdDsa(EdDsaVariant::Ed25519) => Err("Not implemented".into()),
         }
     }
 }
 
 #[cfg(test)]
 mod tests {
-    use super::{EdDsaVariant, SignatureAlgorithm};
+    use super::SignatureAlgorithm;
     use acme_common::crypto::KeyPair;
     use std::str::FromStr;
 
@@ -102,12 +84,6 @@ mod tests {
         }
     }
 
-    #[test]
-    fn test_eddsa_ed25519_to_str() {
-        let a = SignatureAlgorithm::EdDsa(EdDsaVariant::Ed25519);
-        assert_eq!(a.to_string().as_str(), "EdDSA");
-    }
-
     #[test]
     fn test_from_p256() {
         let pem = b"-----BEGIN PRIVATE KEY-----
diff --git a/acmed/src/acme_proto/jws/jwk.rs b/acmed/src/acme_proto/jws/jwk.rs
index 82d1431..7448bf3 100644
--- a/acmed/src/acme_proto/jws/jwk.rs
+++ b/acmed/src/acme_proto/jws/jwk.rs
@@ -4,7 +4,6 @@ use serde::Serialize;
 #[serde(untagged)]
 pub enum Jwk {
     Es256(Es256Jwk),
-    EdDsaEd25519(EdDsaEd25519Jwk),
 }
 
 #[derive(Serialize)]
@@ -30,14 +29,3 @@ impl Es256Jwk {
         }
     }
 }
-
-#[derive(Serialize)]
-pub struct EdDsaEd25519Jwk {
-    // TODO: implement EdDsaEd25519Jwk
-}
-
-impl EdDsaEd25519Jwk {
-    pub fn new() -> Self {
-        EdDsaEd25519Jwk {}
-    }
-}