diff --git a/approx-derive/Cargo.toml b/approx-derive/Cargo.toml
index fd043b3..6a1186b 100644
--- a/approx-derive/Cargo.toml
+++ b/approx-derive/Cargo.toml
@@ -13,7 +13,7 @@ proc-macro = true
 proc-macro-crate = "3.3.0"
 proc-macro2 = "1.0.86"
 quote = "1.0.37"
-syn = { version = "2.0.76", features = ["default", "full"] }
+syn = { version = "3.0.3", features = ["default", "full"] }
 
 [dev-dependencies]
 approx = { path = "../approx/", features = ["tuple_impl", "array_impl"] }