diff --git a/Cargo.lock b/Cargo.lock
index b34cef0..d7b0dc2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -189,30 +189,6 @@ dependencies = [
  "cipher",
 ]
 
-[[package]]
-name = "curve25519-dalek"
-version = "4.1.3"
-source = "git+https://github.com/dalek-cryptography/curve25519-dalek.git?branch=rustcrypto-new-releases#44508ba8652ae3445608ad3c56b63ef528ddfb93"
-dependencies = [
- "cfg-if",
- "cpufeatures",
- "curve25519-dalek-derive",
- "digest",
- "fiat-crypto",
- "rustc_version",
- "subtle",
-]
-
-[[package]]
-name = "curve25519-dalek-derive"
-version = "0.1.1"
-source = "git+https://github.com/dalek-cryptography/curve25519-dalek.git?branch=rustcrypto-new-releases#44508ba8652ae3445608ad3c56b63ef528ddfb93"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "der"
 version = "0.8.0-rc.0"
@@ -274,26 +250,6 @@ dependencies = [
  "spki",
 ]
 
-[[package]]
-name = "ed25519"
-version = "2.3.0-pre.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62bcc0730fbd27c8619332efad3dfa1de229dc5859a31495ab674e0ac0f9996b"
-dependencies = [
- "signature",
-]
-
-[[package]]
-name = "ed25519-dalek"
-version = "2.2.0-pre"
-source = "git+https://github.com/dalek-cryptography/curve25519-dalek.git?branch=rustcrypto-new-releases#44508ba8652ae3445608ad3c56b63ef528ddfb93"
-dependencies = [
- "curve25519-dalek",
- "ed25519",
- "sha2",
- "subtle",
-]
-
 [[package]]
 name = "elliptic-curve"
 version = "0.14.0-pre.6"
@@ -323,12 +279,6 @@ dependencies = [
  "subtle",
 ]
 
-[[package]]
-name = "fiat-crypto"
-version = "0.2.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "28dea519a9695b9977216879a3ebfddf92f1c08c05d984f8996aecd6ecdc811d"
-
 [[package]]
 name = "getrandom"
 version = "0.2.15"
@@ -669,15 +619,6 @@ dependencies = [
  "zeroize",
 ]
 
-[[package]]
-name = "rustc_version"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bfa0f585226d2e68097d4f95d113b15b83a82e819ab25717ec0590d9584ef366"
-dependencies = [
- "semver",
-]
-
 [[package]]
 name = "sec1"
 version = "0.8.0-rc.0"
@@ -692,12 +633,6 @@ dependencies = [
  "zeroize",
 ]
 
-[[package]]
-name = "semver"
-version = "1.0.23"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "61697e0a1c7e512e84a621326239844a24d8207b4669b41bc18b32ea5cbf988b"
-
 [[package]]
 name = "serde"
 version = "1.0.204"
@@ -814,7 +749,6 @@ version = "0.7.0-pre"
 dependencies = [
  "bcrypt-pbkdf",
  "dsa",
- "ed25519-dalek",
  "hex-literal",
  "num-bigint-dig",
  "p256",
diff --git a/Cargo.toml b/Cargo.toml
index f3e59a4..f590137 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,4 +13,4 @@ opt-level = 2
 
 [patch.crates-io]
 # https://github.com/dalek-cryptography/curve25519-dalek/pull/676
-ed25519-dalek = { git = "https://github.com/dalek-cryptography/curve25519-dalek.git", branch = "rustcrypto-new-releases" }
+#ed25519-dalek = { git = "https://github.com/dalek-cryptography/curve25519-dalek.git", branch = "rustcrypto-new-releases" }
diff --git a/ssh-key/Cargo.toml b/ssh-key/Cargo.toml
index 5937f8b..2b6c4f8 100644
--- a/ssh-key/Cargo.toml
+++ b/ssh-key/Cargo.toml
@@ -29,7 +29,7 @@ zeroize = { version = "1", default-features = false }
 bcrypt-pbkdf = { version = "=0.11.0-pre.1", optional = true, default-features = false, features = ["alloc"] }
 bigint = { package = "num-bigint-dig", version = "0.8", optional = true, default-features = false }
 dsa = { version = "=0.7.0-pre.0", optional = true, default-features = false }
-ed25519-dalek = { version = "=2.2.0-pre", optional = true, default-features = false }
+#ed25519-dalek = { version = "=2.2.0-pre", optional = true, default-features = false }
 p256 = { version = "=0.14.0-pre.1", optional = true, default-features = false, features = ["ecdsa"] }
 p384 = { version = "=0.14.0-pre.1", optional = true, default-features = false, features = ["ecdsa"] }
 p521 = { version = "=0.14.0-pre.1", optional = true, default-features = false, features = ["ecdsa"] }
@@ -61,10 +61,10 @@ std = [
     "signature/std"
 ]
 
-crypto = ["ed25519", "p256", "p384", "p521", "rsa"] # NOTE: `dsa` is obsolete/weak
+crypto = ["p256", "p384", "p521", "rsa"] # ... "ed25519"] NOTE: `dsa` is obsolete/weak
 dsa = ["dep:bigint", "dep:dsa", "dep:sha1", "alloc", "signature/rand_core"]
 ecdsa = ["dep:sec1"]
-ed25519 = ["dep:ed25519-dalek", "rand_core"]
+#ed25519 = ["dep:ed25519-dalek", "rand_core"]
 encryption = [
     "dep:bcrypt-pbkdf",
     "alloc",
diff --git a/ssh-key/src/lib.rs b/ssh-key/src/lib.rs
index 2b6eb46..69b3933 100644
--- a/ssh-key/src/lib.rs
+++ b/ssh-key/src/lib.rs
@@ -5,6 +5,7 @@
     html_logo_url = "https://raw.githubusercontent.com/RustCrypto/media/6ee8e381/logo.svg",
     html_favicon_url = "https://raw.githubusercontent.com/RustCrypto/media/6ee8e381/logo.svg"
 )]
+#![allow(unexpected_cfgs)] // `ed25519` is temporarily disabled
 #![forbid(unsafe_code)]
 #![warn(
     clippy::alloc_instead_of_core,
diff --git a/ssh-key/tests/certificate.rs b/ssh-key/tests/certificate.rs
index 632c06f..3577bf5 100644
--- a/ssh-key/tests/certificate.rs
+++ b/ssh-key/tests/certificate.rs
@@ -1,6 +1,7 @@
 //! OpenSSH certificate tests.
 
 #![cfg(feature = "alloc")]
+#![allow(unexpected_cfgs)] // `ed25519` is temporarily disabled
 
 use hex_literal::hex;
 use ssh_key::{Algorithm, Certificate};
diff --git a/ssh-key/tests/certificate_builder.rs b/ssh-key/tests/certificate_builder.rs
index 3c45335..f487a87 100644
--- a/ssh-key/tests/certificate_builder.rs
+++ b/ssh-key/tests/certificate_builder.rs
@@ -5,6 +5,7 @@
     feature = "rand_core",
     any(feature = "ed25519", feature = "p256")
 ))]
+#![allow(unexpected_cfgs)] // `ed25519` is temporarily disabled
 
 use hex_literal::hex;
 use rand_chacha::{rand_core::SeedableRng, ChaCha8Rng};
diff --git a/ssh-key/tests/sshsig.rs b/ssh-key/tests/sshsig.rs
index 09b64ed..72e0438 100644
--- a/ssh-key/tests/sshsig.rs
+++ b/ssh-key/tests/sshsig.rs
@@ -1,6 +1,7 @@
 //! `sshsig` signature tests.
 
 #![cfg(feature = "alloc")]
+#![allow(unexpected_cfgs)] // `ed25519` is temporarily disabled
 
 use hex_literal::hex;
 use ssh_key::{Algorithm, HashAlg, LineEnding, PublicKey, SshSig};