diff --git a/Cargo.toml b/Cargo.toml
index 2c62805..c67d6af 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,7 +18,7 @@ doctest = false
 [dependencies]
 proc-macro2 = "1.0"
 quote = "1.0"
-syn = { version = "1.0", features = ["full"] }
+syn = { version = "2.0", features = ["full"] }
 
 [dev-dependencies]
 serde = { version = "1.0", features = ["derive"] }