diff --git a/Cargo.toml b/Cargo.toml
index 631e2c3..a7e2b36 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,7 +10,7 @@ proc-macro = true
 [dependencies]
 proc-macro2 = "1"
 quote = "1"
-syn = { version = "2", features = ["extra-traits", "derive"] }
+syn = { version = "3", features = ["extra-traits", "derive"] }
 
 [dev-dependencies]
 rustversion = "1.0.20"