diff --git a/Cargo.lock b/Cargo.lock
index 687c6b882..5d74a0e6f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4651,7 +4651,7 @@ dependencies = [
  "prettyplease",
  "serde",
  "serde_json",
- "syn 2.0.119",
+ "syn 3.0.9",
  "tokio",
  "wit-bindgen-core",
  "wit-bindgen-wrpc",
@@ -4667,7 +4667,7 @@ dependencies = [
  "prettyplease",
  "proc-macro2",
  "quote",
- "syn 2.0.119",
+ "syn 3.0.9",
  "wit-bindgen-core",
  "wit-bindgen-wrpc-rust",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index c8f2a58af..8f0c144a1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -180,7 +180,7 @@ rustls = { version = "0.23", default-features = false }
 semver = { version = "1", default-features = false }
 serde = { version = "1", default-features = false }
 serde_json = { version = "1", default-features = false }
-syn = { version = "2", default-features = false, features = ["printing"] }
+syn = { version = "3", default-features = false, features = ["printing"] }
 tempfile = { version = "3", default-features = false }
 test-helpers = { default-features = false, path = "./crates/test-helpers" }
 test-log = { version = "0.2", default-features = false }