diff --git a/Cargo.lock b/Cargo.lock
index 9baa0b47..d2a0019f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -237,7 +237,7 @@ dependencies = [
  "quote",
  "serde",
  "serde_json",
- "syn 2.0.119",
+ "syn 3.0.3",
  "tempfile",
  "thiserror 2.0.19",
 ]
@@ -4812,12 +4812,12 @@ checksum = "925383efa346730478fb4838dbe9137d2a47675ad789c546d150a6e1dd4ab31c"
 
 [[package]]
 name = "prettyplease"
-version = "0.2.37"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "479ca8adacdd7ce8f1fb39ce9ecccbfe93a3f1344b3d0d97f20bc0196208f62b"
+checksum = "2bfe0f4c752e450fc2faf62654f1c134747922825d5b04ca717b8874f41a40c0"
 dependencies = [
  "proc-macro2",
- "syn 2.0.119",
+ "syn 3.0.3",
 ]
 
 [[package]]
diff --git a/crates/llm-codegen/Cargo.toml b/crates/llm-codegen/Cargo.toml
index f9bd9ba5..5c105dcd 100644
--- a/crates/llm-codegen/Cargo.toml
+++ b/crates/llm-codegen/Cargo.toml
@@ -24,12 +24,12 @@ rustdoc-args = ["--cfg", "docsrs"]
 workspace = true
 
 [dependencies]
-prettyplease = "0.2.37"
+prettyplease = "0.3.0"
 proc-macro2 = "1.0.106"
 quote = "1.0.45"
 serde = { workspace = true }
 serde_json = { workspace = true }
-syn = { version = "2.0.117", features = ["full"] }
+syn = { version = "3.0.3", features = ["full"] }
 thiserror = { workspace = true }
 utils = { package = "aether-utils", path = "../utils", version = "0.2.11" }