diff --git a/Cargo.toml b/Cargo.toml
index ddaf176..9b0263b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,7 +17,7 @@ readme = "./README.md"
 proc-macro = true
 
 [dependencies]
-syn = { version = "2", features = [ "full", "visit", "fold", "extra-traits" ] }
+syn = { version = "2.0.85", features = [ "full", "visit", "fold", "extra-traits" ] }
 quote = "1.0.2"
 proc-macro2 = "1.0.3"