diff --git a/Cargo.lock b/Cargo.lock
index 81dbfe03..b22a56de 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "addr2line"
@@ -679,9 +679,9 @@ dependencies = [
 
 [[package]]
 name = "ed25519-dalek"
-version = "2.1.1"
+version = "2.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4a3daa8e81a3963a60642bcc1f90a670680bd4a77535faa384e9d1c79d620871"
+checksum = "70e796c081cee67dc755e1a36a0a172b897fab85fc3f6bc48307991f64e4eca9"
 dependencies = [
  "curve25519-dalek",
  "ed25519",
diff --git a/signature/Cargo.toml b/signature/Cargo.toml
index 5a10a1d5..cc50c997 100644
--- a/signature/Cargo.toml
+++ b/signature/Cargo.toml
@@ -13,7 +13,7 @@ categories = ["cryptography"]
 
 [dependencies]
 ecdsa = { version = "^0.16.9", features = ["der", "signing", "verifying"] }
-ed25519-dalek = { version = "2.1.1", features = ["rand_core"] }
+ed25519-dalek = { version = "2.2.0", features = ["rand_core"] }
 generic-array = "^0.14.7"
 p256 = { version = "^0.13.2", features = ["ecdsa"] }
 rand = "^0.8"
diff --git a/tests/Cargo.toml b/tests/Cargo.toml
index 4d39673f..04497a99 100644
--- a/tests/Cargo.toml
+++ b/tests/Cargo.toml
@@ -12,7 +12,7 @@ publish = false
 
 [dependencies]
 base64 = "^0.22"
-ed25519-dalek = { version = "2.1.1", features = ["rand_core"] }
+ed25519-dalek = { version = "2.2.0", features = ["rand_core"] }
 generic-array = "^0.14.7"
 hex = "^0.4.3"
 p256 = { version = "^0.13.2", features = ["ecdsa", "pkcs8"] }