diff --git a/crates/marine-test-macro-impl/Cargo.toml b/crates/marine-test-macro-impl/Cargo.toml
index 8b4709e9..904da8d9 100644
--- a/crates/marine-test-macro-impl/Cargo.toml
+++ b/crates/marine-test-macro-impl/Cargo.toml
@@ -21,7 +21,7 @@ darling = "0.20.1"
 quote = "1.0.26"
 proc-macro2 = "1.0.56"
 proc-macro-error = { version = "1.0.4", default-features = false }
-syn = { version = '2.0.15', features = ['full'] }
+syn = { version = '2.0.28', features = ['full'] }
 thiserror = "1.0.40"
 static_assertions = "1.1.0"
 
diff --git a/crates/marine-test-macro/Cargo.toml b/crates/marine-test-macro/Cargo.toml
index e92751d4..9e68e612 100644
--- a/crates/marine-test-macro/Cargo.toml
+++ b/crates/marine-test-macro/Cargo.toml
@@ -23,4 +23,4 @@ marine-test-macro-impl = { path = "../marine-test-macro-impl", version = "=0.10.
 quote = "1.0.26"
 proc-macro2 = "1.0.56"
 proc-macro-error = { version = "1.0.4", default-features = false }
-syn = { version = '2.0.15', features = ['full'] }
+syn = { version = '2.0.28', features = ['full'] }