diff --git a/eventually-macros/Cargo.toml b/eventually-macros/Cargo.toml
index 9464cd56..3a8bbe81 100644
--- a/eventually-macros/Cargo.toml
+++ b/eventually-macros/Cargo.toml
@@ -20,6 +20,6 @@ keywords = ["architecture", "ddd", "event-sourcing", "cqrs", "es"]
 proc-macro = true
 
 [dependencies]
-syn = { version = "2.0.100", features = ["full"] }
+syn = { version = "3.0.0", features = ["full"] }
 quote = "1.0.40"
 eventually = { path = "../eventually" }