diff --git a/Cargo.lock b/Cargo.lock
index 97cf23c3..f637b172 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3410,9 +3410,9 @@ checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
 
 [[package]]
 name = "spki"
-version = "0.5.3"
+version = "0.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "964d3a6f8b7ef6d6d20887f4c30c4848f4ffa05f600c87277d30a5b4fe32cb4b"
+checksum = "44d01ac02a6ccf3e07db148d2be087da624fea0221a16152ed01f0496a6b0a27"
 dependencies = [
  "base64ct",
  "der",
diff --git a/ethers-signers/Cargo.toml b/ethers-signers/Cargo.toml
index d520a6f8..77c21228 100644
--- a/ethers-signers/Cargo.toml
+++ b/ethers-signers/Cargo.toml
@@ -35,7 +35,7 @@ rusoto_core = { version = "0.47.0", optional = true }
 rusoto_kms = { version = "0.47.0", optional = true }
 tracing = { version = "0.1.29", optional = true }
 tracing-futures = { version = "0.2.5", optional = true }
-spki = { version = "0.5.2", optional = true }
+spki = { version = "0.5.4", optional = true }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 eth-keystore = { version = "0.3.0" }