diff --git a/Cargo.lock b/Cargo.lock
index 66f7b9c..ca5aae6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4863,7 +4863,7 @@ dependencies = [
  "schemars 0.8.22",
  "serde",
  "serde_json",
- "syn 2.0.119",
+ "syn 3.0.4",
  "uuid",
  "v-api",
  "v-model",
diff --git a/Cargo.toml b/Cargo.toml
index 2024ddd..392941b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -69,7 +69,7 @@ serde_urlencoded = "0.7.1"
 sha2 = "0.11.0"
 slog = "2.8.2"
 steno = { git = "https://github.com/oxidecomputer/steno" }
-syn = "2"
+syn = "3"
 tabwriter = "1.4.1"
 tap = "1.0.1"
 tempfile = "3"