diff --git a/Cargo.lock b/Cargo.lock
index 50c5415..0d405a5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -53,6 +53,15 @@ dependencies = [
  "generic-array 0.14.9",
 ]
 
+[[package]]
+name = "block-buffer"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2f6c7dbe95a6ed67ad9f18e57daf93a2f034c524b99fd2b76d18fdfeb6660aa"
+dependencies = [
+ "hybrid-array",
+]
+
 [[package]]
 name = "cfg-if"
 version = "1.0.4"
@@ -116,17 +125,28 @@ dependencies = [
  "typenum",
 ]
 
+[[package]]
+name = "crypto-common"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce6e4c961d6cd6c9a86db418387425e8bdeaf05b3c8bc1411e6dca4c252f1453"
+dependencies = [
+ "hybrid-array",
+ "rand_core 0.10.1",
+]
+
 [[package]]
 name = "curve25519-dalek"
-version = "4.1.3"
+version = "5.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97fb8b7c4503de7d6ae7b42ab72a5a59857b4c937ec27a3d4539dba95b5ab2be"
+checksum = "b5eed333089e2e1c1ac8c6c0398e5e2497b4c9926ca6d0365ed1e099afa5bc23"
 dependencies = [
  "cfg-if",
- "cpufeatures 0.2.17",
+ "cpufeatures 0.3.0",
  "curve25519-dalek-derive",
+ "digest 0.11.3",
  "fiat-crypto",
- "rand_core 0.6.4",
+ "rand_core 0.10.1",
  "rustc_version",
  "serde",
  "subtle",
@@ -171,8 +191,18 @@ version = "0.10.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
 dependencies = [
- "block-buffer",
- "crypto-common",
+ "block-buffer 0.10.4",
+ "crypto-common 0.1.6",
+]
+
+[[package]]
+name = "digest"
+version = "0.11.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1dd6dbb5841937940781866fa1281a1ff7bd3bf827091440879f9994983d5c2"
+dependencies = [
+ "block-buffer 0.12.1",
+ "crypto-common 0.2.2",
 ]
 
 [[package]]
@@ -194,7 +224,7 @@ checksum = "b5e6043086bf7973472e0c7dff2142ea0b680d30e18d9cc40f267efbf222bd47"
 dependencies = [
  "base16ct",
  "crypto-bigint",
- "digest",
+ "digest 0.10.7",
  "ff",
  "generic-array 0.14.9",
  "group",
@@ -232,9 +262,9 @@ dependencies = [
 
 [[package]]
 name = "fiat-crypto"
-version = "0.2.9"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "28dea519a9695b9977216879a3ebfddf92f1c08c05d984f8996aecd6ecdc811d"
+checksum = "64cd1e32ddd350061ae6edb1b082d7c54915b5c672c389143b9a63403a109f24"
 
 [[package]]
 name = "fnv"
@@ -305,6 +335,15 @@ version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
+[[package]]
+name = "hybrid-array"
+version = "0.4.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "818356c5132c1fede50f837ca96afbe78ff42413047f4abb886217845e1b6c8c"
+dependencies = [
+ "typenum",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.18"
@@ -651,7 +690,7 @@ checksum = "a7507d819769d01a365ab707794a4084392c824f54a7a6a7862f8c3d0892b283"
 dependencies = [
  "cfg-if",
  "cpufeatures 0.2.17",
- "digest",
+ "digest 0.10.7",
 ]
 
 [[package]]
@@ -714,7 +753,7 @@ version = "0.6.0-pre.3"
 dependencies = [
  "curve25519-dalek",
  "derive-where",
- "digest",
+ "digest 0.10.7",
  "displaydoc",
  "elliptic-curve",
  "generic-array 1.4.3",
diff --git a/Cargo.toml b/Cargo.toml
index 4e729c3..2ecf594 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,7 +20,7 @@ serde = ["curve25519-dalek?/serde", "generic-array/serde", "dep:serde"]
 std = ["alloc"]
 
 [dependencies]
-curve25519-dalek = { version = "4", default-features = false, features = [
+curve25519-dalek = { version = "5", default-features = false, features = [
   "rand_core",
   "zeroize",
 ], optional = true }