diff --git a/Cargo.lock b/Cargo.lock
index d454b987..d02f1c16 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3483,9 +3483,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.85"
+version = "1.0.86"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a684ac3dcd8913827e18cd09a68384ee66c1de24157e3c556c9ab16d85695fb7"
+checksum = "8a65b3f4ffa0092e9887669db0eae07941f023991ab58ea44da8fe8e2d511c6b"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/ethers-core/Cargo.toml b/ethers-core/Cargo.toml
index c2934bc5..70b1812a 100644
--- a/ethers-core/Cargo.toml
+++ b/ethers-core/Cargo.toml
@@ -36,7 +36,7 @@ cargo_metadata = { version = "0.14.1", optional = true }
 
 # eip712 feature enabled dependencies
 convert_case = { version = "0.5.0", optional = true }
-syn = { version = "1.0.85", optional = true }
+syn = { version = "1.0.86", optional = true }
 quote = { version = "1.0.14", optional = true }
 proc-macro2 = { version = "1.0.36", optional = true }