diff --git a/rnex-rmc/macros/Cargo.toml b/rnex-rmc/macros/Cargo.toml
index 34de59d..c2143da 100644
--- a/rnex-rmc/macros/Cargo.toml
+++ b/rnex-rmc/macros/Cargo.toml
@@ -16,4 +16,4 @@ doctest = false
 [dependencies]
 quote = "1.0.38"
 proc-macro2 = "1.0.93"
-syn = { version =  "2.0.98", features = ["full"] }
+syn = { version =  "3.0.0", features = ["full"] }