diff --git a/macros/Cargo.toml b/macros/Cargo.toml
index ea9f1d9..0127817 100644
--- a/macros/Cargo.toml
+++ b/macros/Cargo.toml
@@ -23,5 +23,5 @@ version = "1"
 version = "1"
 
 [dependencies.syn]
-version = "2"
+version = "3"
 features = ["full"]