diff --git a/Cargo.lock b/Cargo.lock
index 3d5770f6..2bae1a9c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -648,6 +648,12 @@ version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e4c78c047431fee22c1a7bb92e00ad095a02a983affe4d8a72e2a2c62c1b94f3"
 
+[[package]]
+name = "const-oid"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "722e23542a15cea1f65d4a1419c4cfd7a26706c70871a13a04238ca3f40f1661"
+
 [[package]]
 name = "constant_time_eq"
 version = "0.1.5"
@@ -894,7 +900,16 @@ version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6919815d73839e7ad218de758883aae3a257ba6759ce7a9992501efbb53d705c"
 dependencies = [
- "const-oid",
+ "const-oid 0.7.1",
+]
+
+[[package]]
+name = "der"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "13dd2ae565c0a381dde7fade45fce95984c568bdcb4700a4fdbe3175e0380b2f"
+dependencies = [
+ "const-oid 0.9.0",
 ]
 
 [[package]]
@@ -977,7 +992,7 @@ version = "0.13.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d0d69ae62e0ce582d56380743515fefaf1a8c70cec685d9677636d7e30ae9dc9"
 dependencies = [
- "der",
+ "der 0.5.1",
  "elliptic-curve",
  "rfc6979",
  "signature",
@@ -1020,7 +1035,7 @@ checksum = "25b477563c2bfed38a3b7a60964c49e058b2510ad3f12ba3483fd8f62c2306d6"
 dependencies = [
  "base16ct",
  "crypto-bigint",
- "der",
+ "der 0.5.1",
  "ff",
  "generic-array 0.14.5",
  "group",
@@ -1369,7 +1384,7 @@ dependencies = [
  "semver",
  "serde_json",
  "sha2 0.9.9",
- "spki",
+ "spki 0.6.0",
  "tempfile",
  "thiserror",
  "tokio",
@@ -2663,8 +2678,8 @@ version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7cabda3fb821068a9a4fab19a683eac3af12edf0f34b94a8be53c4972b8149d0"
 dependencies = [
- "der",
- "spki",
+ "der 0.5.1",
+ "spki 0.5.4",
  "zeroize",
 ]
 
@@ -3273,7 +3288,7 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "08da66b8b0965a5555b6bd6639e68ccba85e1e2506f5fbb089e93f8a04e1a2d1"
 dependencies = [
- "der",
+ "der 0.5.1",
  "generic-array 0.14.5",
  "pkcs8",
  "subtle",
@@ -3587,7 +3602,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "44d01ac02a6ccf3e07db148d2be087da624fea0221a16152ed01f0496a6b0a27"
 dependencies = [
  "base64ct",
- "der",
+ "der 0.5.1",
+]
+
+[[package]]
+name = "spki"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "67cf02bbac7a337dc36e4f5a693db6c21e7863f45070f7064577eb4367a3212b"
+dependencies = [
+ "der 0.6.0",
 ]
 
 [[package]]
diff --git a/ethers-signers/Cargo.toml b/ethers-signers/Cargo.toml
index 5c157163..25ec3bf3 100644
--- a/ethers-signers/Cargo.toml
+++ b/ethers-signers/Cargo.toml
@@ -34,7 +34,7 @@ trezor-client = { version = "0.0.5", optional = true, default-features = false,
 rusoto_core = { version = "0.48.0", optional = true }
 rusoto_kms = { version = "0.48.0", optional = true }
 tracing = { version = "0.1.34", optional = true }
-spki = { version = "0.5.4", optional = true }
+spki = { version = "0.6.0", optional = true }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 eth-keystore = { version = "0.4.1" }