diff --git a/Cargo.lock b/Cargo.lock
index 929f072a57..e3433e5dc0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -510,7 +510,7 @@ version = "0.16.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.16",
+ "syn 2.0.18",
  "synstructure 0.13.0",
 ]
 
@@ -808,7 +808,7 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn 2.0.16",
+ "syn 2.0.18",
 ]
 
 [[package]]
@@ -1139,7 +1139,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "scratch",
- "syn 2.0.16",
+ "syn 2.0.18",
 ]
 
 [[package]]
@@ -1156,7 +1156,7 @@ checksum = "2345488264226bf682893e25de0769f3360aac9957980ec49361b083ddaa5bc5"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.16",
+ "syn 2.0.18",
 ]
 
 [[package]]
@@ -1616,7 +1616,7 @@ checksum = "89ca545a94061b6365f2c7355b4b32bd20df3ff95f02da9329b34ccc3bd6ee72"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.16",
+ "syn 2.0.18",
 ]
 
 [[package]]
@@ -2796,7 +2796,7 @@ dependencies = [
  "proc-macro-crate",
  "proc-macro2",
  "quote",
- "syn 2.0.16",
+ "syn 2.0.18",
 ]
 
 [[package]]
@@ -2880,7 +2880,7 @@ checksum = "a948666b637a0f465e8564c73e89d4dde00d72d4d473cc972f390fc3dcee7d9c"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.16",
+ "syn 2.0.18",
 ]
 
 [[package]]
@@ -3640,7 +3640,7 @@ checksum = "8c805777e3930c8883389c602315a24224bcc738b63905ef87cd1420353ea93e"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.16",
+ "syn 2.0.18",
 ]
 
 [[package]]
@@ -3662,7 +3662,7 @@ checksum = "bcec881020c684085e55a25f7fd888954d56609ef363479dc5a1305eb0d40cab"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.16",
+ "syn 2.0.18",
 ]
 
 [[package]]
@@ -3977,9 +3977,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.16"
+version = "2.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a6f671d4b5ffdb8eadec19c0ae67fe2639df8684bd7bc4b83d986b8db549cf01"
+checksum = "32d41677bcbe24c20c52e7c70b0d8db04134c5d1066bf98662e2871ad200ea3e"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -4006,7 +4006,7 @@ checksum = "285ba80e733fac80aa4270fbcdf83772a79b80aa35c97075320abfee4a915b06"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.16",
+ "syn 2.0.18",
  "unicode-xid",
 ]
 
@@ -4099,7 +4099,7 @@ checksum = "f9456a42c5b0d803c8cd86e73dd7cc9edd429499f37a3550d286d5e86720569f"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.16",
+ "syn 2.0.18",
 ]
 
 [[package]]
@@ -4565,7 +4565,7 @@ dependencies = [
  "once_cell",
  "proc-macro2",
  "quote",
- "syn 2.0.16",
+ "syn 2.0.18",
  "wasm-bindgen-shared",
 ]
 
@@ -4599,7 +4599,7 @@ checksum = "e128beba882dd1eb6200e1dc92ae6c5dbaa4311aa7bb211ca035779e5efc39f8"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.16",
+ "syn 2.0.18",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
diff --git a/boa_macros/Cargo.toml b/boa_macros/Cargo.toml
index af867e2b0e..ea45731e6f 100644
--- a/boa_macros/Cargo.toml
+++ b/boa_macros/Cargo.toml
@@ -13,6 +13,6 @@ proc-macro = true
 
 [dependencies]
 quote = "1.0.28"
-syn = { version = "2.0.16", features = ["full"] }
+syn = { version = "2.0.18", features = ["full"] }
 proc-macro2 = "1.0"
 synstructure = "0.13"