diff --git a/crates/macro-testing-utils/Cargo.toml b/crates/macro-testing-utils/Cargo.toml
index d0c5c940..df6f9f26 100644
--- a/crates/macro-testing-utils/Cargo.toml
+++ b/crates/macro-testing-utils/Cargo.toml
@@ -18,4 +18,4 @@ doctest = false
 [dependencies]
 quote = "1.0.33"
 proc-macro2 = "1.0.69"
-syn = { version = '1.0.109', features = ['full'] }
+syn = { version = '2.0.57', features = ['full'] }
diff --git a/crates/marine-macro-impl/Cargo.toml b/crates/marine-macro-impl/Cargo.toml
index 6eb33adb..3ac336c0 100644
--- a/crates/marine-macro-impl/Cargo.toml
+++ b/crates/marine-macro-impl/Cargo.toml
@@ -18,7 +18,7 @@ quote = "1.0.33"
 proc-macro2 = "1.0.69"
 serde = { version = "1.0.189", features = ["derive"] }
 serde_json = "1.0.107"
-syn = { version = '1.0.109', features = ['full', "extra-traits"] }
+syn = { version = '2.0.57', features = ['full', "extra-traits"] }
 
 [dev-dependencies]
 pretty_assertions = "1.4.0"