diff --git a/Cargo.toml b/Cargo.toml
index ebdd2f4..357fd1e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,7 +20,7 @@ quote = "1"
 
 [dependencies.syn]
 features = ["extra-traits", "full"]
-version = "1.0.12"
+version = "2.0.18"
 
 [dev-dependencies]
 mock = { path = "mock" }