diff --git a/impl/Cargo.toml b/impl/Cargo.toml
index cfd82220..626330c5 100644
--- a/impl/Cargo.toml
+++ b/impl/Cargo.toml
@@ -25,7 +25,7 @@ proc-macro = true
 [dependencies]
 proc-macro2 = "1.0"
 quote = "1.0"
-syn = "2.0.45"
+syn = "3.0.2"
 convert_case = { version = "0.11", optional = true }
 unicode-ident = { version = "1.0", optional = true }