diff --git a/packtool-macro/Cargo.toml b/packtool-macro/Cargo.toml
index 733f6bb..2f29831 100644
--- a/packtool-macro/Cargo.toml
+++ b/packtool-macro/Cargo.toml
@@ -17,7 +17,7 @@ proc-macro = true
 [dependencies]
 proc-macro2 = "1.0"
 quote = "1.0"
-syn = "1.0.60"
+syn = "2.0.15"
 
 # be kind with crates.io and only compile the doc once
 # there's no difference based on the architecture anyway