diff --git a/Cargo.lock b/Cargo.lock
index fbb599fa..0af2fd6c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -95,7 +95,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ccc0a48a9b826acdf4028595adc9db92caea352f7af011a3034acd172a52a0aa"
 dependencies = [
  "quote",
- "syn",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -122,7 +122,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "scratch",
- "syn",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -139,7 +139,7 @@ checksum = "34fa7e395dc1c001083c7eed28c8f0f0b5a225610f3b6284675f444af6fab86b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -260,7 +260,7 @@ dependencies = [
  "quote",
  "serde",
  "serde_json",
- "syn",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -273,7 +273,7 @@ dependencies = [
  "quote",
  "serde",
  "serde_json",
- "syn",
+ "syn 2.0.28",
 ]
 
 [[package]]
@@ -282,7 +282,7 @@ version = "0.8.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.28",
 ]
 
 [[package]]
@@ -393,18 +393,18 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.51"
+version = "1.0.66"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5d727cae5b39d21da60fa540906919ad737832fe0b1c165da3a34d6548c849d6"
+checksum = "18fb31db3f9bddb2ea821cde30a9f70117e3f119938b5ee630b7403aa6e2ead9"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.23"
+version = "1.0.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8856d8364d252a14d474036ea1358d63c9e6965c8e5c1885c18f73d70bff9c7b"
+checksum = "50f3b39ccfb720540debaa0164757101c08ecb8d326b15358ce76a62c7e85965"
 dependencies = [
  "proc-macro2",
 ]
@@ -438,7 +438,7 @@ checksum = "d071a94a3fac4aff69d023a7f411e33f40f3483f8c5190b1953822b6b76d7630"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -476,6 +476,17 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "syn"
+version = "2.0.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "04361975b3f5e348b2189d8dc55bc942f278b2d482a6a0365de5bdd62d351567"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
 [[package]]
 name = "termcolor"
 version = "1.1.2"
@@ -587,7 +598,7 @@ dependencies = [
  "once_cell",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
  "wasm-bindgen-shared",
 ]
 
@@ -609,7 +620,7 @@ checksum = "07bc0c051dc5f23e307b13285f9d75df86bfdf816c5721e573dec1f9b8aa193c"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
diff --git a/crates/macro-testing-utils/Cargo.toml b/crates/macro-testing-utils/Cargo.toml
index 02a3334a..972c1576 100644
--- a/crates/macro-testing-utils/Cargo.toml
+++ b/crates/macro-testing-utils/Cargo.toml
@@ -18,4 +18,4 @@ doctest = false
 [dependencies]
 quote = "1.0.23"
 proc-macro2 = "1.0.51"
-syn = { version = '1.0.109', features = ['full'] }
+syn = { version = '2.0.28', features = ['full'] }
diff --git a/crates/marine-macro-impl/Cargo.toml b/crates/marine-macro-impl/Cargo.toml
index f4d52157..14238662 100644
--- a/crates/marine-macro-impl/Cargo.toml
+++ b/crates/marine-macro-impl/Cargo.toml
@@ -18,7 +18,7 @@ quote = "1.0.23"
 proc-macro2 = "1.0.51"
 serde = { version = "1.0.155", features = ["derive"] }
 serde_json = "1.0.94"
-syn = { version = '1.0.109', features = ['full', "extra-traits"] }
+syn = { version = '2.0.28', features = ['full', "extra-traits"] }
 
 [dev-dependencies]
 pretty_assertions = "1.3.0"