diff --git a/ed25519/Cargo.toml b/ed25519/Cargo.toml
index 5f01afe2..c0368e7e 100644
--- a/ed25519/Cargo.toml
+++ b/ed25519/Cargo.toml
@@ -23,7 +23,7 @@ signature = { version = "3.0.0-rc.0", default-features = false }
 # optional dependencies
 pkcs8 = { version = "0.11.0-rc.2", optional = true }
 serde = { version = "1", optional = true, default-features = false }
-serde_bytes = { version = "0.11", optional = true }
+serde_bytes = { version = "0.11", optional = true, default-features = false }
 zeroize = { version = "1", optional = true, default-features = false }
 
 [dev-dependencies]
@@ -34,11 +34,10 @@ hex-literal = "1"
 rand_core = { version = "0.9", features = ["std"] }
 
 [features]
-default = ["std"]
+default = ["alloc"]
 alloc = ["pkcs8?/alloc"]
 pem = ["alloc", "pkcs8/pem"]
 serde_bytes = ["serde", "dep:serde_bytes"]
-std = ["pkcs8?/std"]
 
 [package.metadata.docs.rs]
 all-features = true
diff --git a/ed448/Cargo.toml b/ed448/Cargo.toml
index 2a19c8e7..37cc3ff9 100644
--- a/ed448/Cargo.toml
+++ b/ed448/Cargo.toml
@@ -31,8 +31,7 @@ hex-literal = "1"
 bincode = "1"
 
 [features]
-default = ["std"]
+default = ["alloc"]
 alloc = ["pkcs8?/alloc"]
 pem = ["alloc", "pkcs8/pem"]
 serde_bytes = ["serde", "dep:serde_bytes"]
-std = ["pkcs8?/std", "serde_bytes?/std"]