diff --git a/gc_derive/Cargo.toml b/gc_derive/Cargo.toml
index e1012fe..57a27eb 100644
--- a/gc_derive/Cargo.toml
+++ b/gc_derive/Cargo.toml
@@ -15,7 +15,7 @@ name = "gc_derive"
 proc-macro = true
 
 [dependencies]
-syn = "1.0"
+syn = "2.0"
 proc-macro2 = "1.0"
 quote = "1.0"
 synstructure = "0.13"