diff --git a/Cargo.lock b/Cargo.lock
index 8a4294345..264b066f0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -824,9 +824,9 @@ checksum = "5827cebf4670468b8772dd191856768aedcb1b0278a04f989f7766351917b9dc"
 
 [[package]]
 name = "cpufeatures"
-version = "0.2.5"
+version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "28d997bd5e24a5928dd43e46dc529867e207907fe0b239c3477d924f7f2ca320"
+checksum = "03e69e28e9f7f77debdedbaafa2866e1de9ba56df55a8bd7cfc724c25a09987c"
 dependencies = [
  "libc",
 ]
@@ -996,19 +996,32 @@ dependencies = [
 
 [[package]]
 name = "curve25519-dalek"
-version = "4.0.0-rc.2"
+version = "4.0.0-rc.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "03d928d978dbec61a1167414f5ec534f24bea0d7a0d24dd9b6233d3d8223e585"
+checksum = "436ace70fc06e06f7f689d2624dc4e2f0ea666efb5aa704215f7249ae6e047a7"
 dependencies = [
  "cfg-if",
+ "cpufeatures",
+ "curve25519-dalek-derive",
  "digest 0.10.6",
  "fiat-crypto",
- "packed_simd_2",
  "platforms",
+ "rustc_version",
  "subtle",
  "zeroize",
 ]
 
+[[package]]
+name = "curve25519-dalek-derive"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "83fdaf97f4804dcebfa5862639bc9ce4121e82140bec2a987ac5140294865b5b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.18",
+]
+
 [[package]]
 name = "cxx"
 version = "1.0.91"
@@ -1576,11 +1589,11 @@ dependencies = [
 
 [[package]]
 name = "ed25519-dalek"
-version = "2.0.0-rc.2"
+version = "2.0.0-rc.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "798f704d128510932661a3489b08e3f4c934a01d61c5def59ae7b8e48f19665a"
+checksum = "faa8e9049d5d72bfc12acbc05914731b5322f79b5e2f195e9f2d705fca22ab4c"
 dependencies = [
- "curve25519-dalek 4.0.0-rc.2",
+ "curve25519-dalek 4.0.0-rc.3",
  "ed25519 2.2.0",
  "serde",
  "sha2 0.10.6",
@@ -2323,7 +2336,7 @@ version = "2.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6cb51c9a029ddc91b07a787f1d86b53ccfa49b0e86688c946ebe8d3555685dd7"
 dependencies = [
- "libm 0.2.6",
+ "libm",
 ]
 
 [[package]]
@@ -2653,12 +2666,6 @@ version = "0.2.146"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f92be4933c13fd498862a9e02a3055f8a8d9c039ce33db97306fd5a6caa7f29b"
 
-[[package]]
-name = "libm"
-version = "0.1.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fc7aa29613bd6a620df431842069224d8bc9011086b1db4c0e0cd47fa03ec9a"
-
 [[package]]
 name = "libm"
 version = "0.2.6"
@@ -2975,7 +2982,7 @@ checksum = "2399c9463abc5f909349d8aa9ba080e0b88b3ce2885389b60b993f39b1a56905"
 dependencies = [
  "byteorder",
  "lazy_static",
- "libm 0.2.6",
+ "libm",
  "num-integer",
  "num-iter",
  "num-traits",
@@ -3035,7 +3042,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "578ede34cf02f8924ab9447f50c28075b4d3e5b269972345e7e0372b38c6cdcd"
 dependencies = [
  "autocfg",
- "libm 0.2.6",
+ "libm",
 ]
 
 [[package]]
@@ -3216,16 +3223,6 @@ dependencies = [
  "sha2 0.10.6",
 ]
 
-[[package]]
-name = "packed_simd_2"
-version = "0.3.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1914cd452d8fccd6f9db48147b29fd4ae05bea9dc5d9ad578509f72415de282"
-dependencies = [
- "cfg-if",
- "libm 0.1.4",
-]
-
 [[package]]
 name = "parking"
 version = "2.0.0"
@@ -3317,7 +3314,7 @@ dependencies = [
  "derive_builder",
  "des",
  "digest 0.10.6",
- "ed25519-dalek 2.0.0-rc.2",
+ "ed25519-dalek 2.0.0-rc.3",
  "elliptic-curve 0.13.2",
  "flate2",
  "generic-array",