diff --git a/protocol/Cargo.lock b/protocol/Cargo.lock
index 21e671c..9ed3433 100644
--- a/protocol/Cargo.lock
+++ b/protocol/Cargo.lock
@@ -497,9 +497,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.59"
+version = "1.0.66"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6aeca18b86b413c660b781aa319e4e2648a3e6f9eadc9b47e9038e6fe9f3451b"
+checksum = "18fb31db3f9bddb2ea821cde30a9f70117e3f119938b5ee630b7403aa6e2ead9"
 dependencies = [
  "unicode-ident",
 ]
@@ -653,9 +653,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.18"
+version = "2.0.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32d41677bcbe24c20c52e7c70b0d8db04134c5d1066bf98662e2871ad200ea3e"
+checksum = "04361975b3f5e348b2189d8dc55bc942f278b2d482a6a0365de5bdd62d351567"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/protocol/Cargo.toml b/protocol/Cargo.toml
index 861efcb..4001da9 100644
--- a/protocol/Cargo.toml
+++ b/protocol/Cargo.toml
@@ -23,4 +23,4 @@ serde = {version="1.0", features=["derive"]}
 image = "0.24"
 quote = "1.0.28"
 prettyplease = "0.2.6"
-syn = "2.0.18"
+syn = "2.0.28"