diff --git a/third-party/manyhow/Cargo.toml b/third-party/manyhow/Cargo.toml
index 5909456..aed06fc 100644
--- a/third-party/manyhow/Cargo.toml
+++ b/third-party/manyhow/Cargo.toml
@@ -77,7 +77,7 @@ version = "1.0.60"
 version = "1"
 
 [dependencies.syn1]
-version = "1"
+version = "3"
 features = ["printing"]
 optional = true
 default-features = false