diff --git a/lang-util-derive/Cargo.toml b/lang-util-derive/Cargo.toml
index f8ebb842a..50642d8da 100644
--- a/lang-util-derive/Cargo.toml
+++ b/lang-util-derive/Cargo.toml
@@ -20,4 +20,4 @@ proc-macro = true
 darling = "0.14"
 proc-macro2 = "1.0"
 quote = "1.0"
-syn = "1.0"
+syn = "2.0"