diff --git a/Cargo.lock b/Cargo.lock
index e18fb44d..a4ecc3d1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3799,9 +3799,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.98"
+version = "1.0.99"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c50aef8a904de4c23c788f104b7dddc7d6f79c647c7c8ce4cc8f73eb0ca773dd"
+checksum = "58dbef6ec655055e20b86b15a8cc6d439cca19b667537ac6a1369572d151ab13"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/ethers-core/Cargo.toml b/ethers-core/Cargo.toml
index d2f1a1de..e9f2aa25 100644
--- a/ethers-core/Cargo.toml
+++ b/ethers-core/Cargo.toml
@@ -39,7 +39,7 @@ cargo_metadata = { version = "0.15.0", optional = true }
 
 # eip712 feature enabled dependencies
 convert_case = { version = "0.5.0", optional = true }
-syn = { version = "1.0.98", optional = true }
+syn = { version = "1.0.99", optional = true }
 proc-macro2 = { version = "1.0.42", optional = true }
 rust_decimal = "1.25.0"