diff --git a/structform-derive/Cargo.toml b/structform-derive/Cargo.toml
index 0ac0d05..2ca0129 100644
--- a/structform-derive/Cargo.toml
+++ b/structform-derive/Cargo.toml
@@ -16,5 +16,5 @@ authors = [
 proc-macro=true
 
 [dependencies]
-syn="1"
+syn="2"
 quote="1"