diff --git a/aper/aper_derive/Cargo.toml b/aper/aper_derive/Cargo.toml
index 2184653..d6ff50a 100644
--- a/aper/aper_derive/Cargo.toml
+++ b/aper/aper_derive/Cargo.toml
@@ -18,4 +18,4 @@ proc-macro = true
 inflections = "1.1.1"
 proc-macro2 = "1.0.43"
 quote = "1.0.21"
-syn = "2.0.1"
+syn = {version="2.0.1", features=["full"]}