diff --git a/Cargo.toml b/Cargo.toml
index 66ce0410157..0d39517ede3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -109,7 +109,7 @@ smol = "2.0.2"
 rustyline = { version = "18.0.0", default-features = false }
 dhat = "0.3.3"
 quote = "1.0.45"
-syn = { version = "2.0.116", default-features = false }
+syn = { version = "3.0.3", default-features = false }
 proc-macro2 = "1.0"
 synstructure = "0.13"
 measureme = "12.0.3"