diff --git a/backend/Cargo.lock b/backend/Cargo.lock
index ffd79f502..dd2d9559b 100644
--- a/backend/Cargo.lock
+++ b/backend/Cargo.lock
@@ -142,7 +142,7 @@ checksum = "c7c24de15d275a1ecfd47a380fb4d5ec9bfe0933f309ed5e705b775596a3574d"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.118",
+ "syn 2.0.119",
 ]
 
 [[package]]
@@ -444,7 +444,7 @@ dependencies = [
  "provider-openai",
  "provider-xai",
  "serde",
- "syn 2.0.118",
+ "syn 3.0.3",
  "tempfile",
  "thiserror",
  "tokio",
@@ -723,7 +723,7 @@ checksum = "f46882e17999c6cc590af592290432be3bce0428cb0d5f8b6715e4dc7b383eb3"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.118",
+ "syn 2.0.119",
 ]
 
 [[package]]
@@ -799,7 +799,7 @@ checksum = "1ac70aa55017e108007fbaf5aa0f54b021c98f92ff8af59d42eda9da96e3dd4f"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.118",
+ "syn 2.0.119",
 ]
 
 [[package]]
@@ -1100,7 +1100,7 @@ checksum = "2d6d3cde68c518367be28956066ddfef33813991b77a55005a69dae04bf3b10b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.118",
+ "syn 2.0.119",
 ]
 
 [[package]]
@@ -2918,7 +2918,7 @@ dependencies = [
  "quote",
  "sqlx-core",
  "sqlx-macros-core",
- "syn 2.0.118",
+ "syn 2.0.119",
 ]
 
 [[package]]
@@ -2941,7 +2941,7 @@ dependencies = [
  "sqlx-mysql",
  "sqlx-postgres",
  "sqlx-sqlite",
- "syn 2.0.118",
+ "syn 2.0.119",
  "thiserror",
  "tokio",
  "url",
@@ -3066,9 +3066,9 @@ checksum = "a7973cce6668464ea31f176d85b13c7ab3bba2cb3b77a2ed26abd7801688010a"
 
 [[package]]
 name = "syn"
-version = "2.0.118"
+version = "2.0.119"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b9ae57f904213ebb649ce6895b8a66c66f0203b9319718f69a5612a065b1422"
+checksum = "872831b642d1a07999a962a351ed35b955ea2cfc8f3862091e2a240a84f17297"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3103,7 +3103,7 @@ checksum = "728a70f3dbaf5bab7f0c4b1ac8d7ae5ea60a4b5549c8a5914361c99147a709d2"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.118",
+ "syn 2.0.119",
 ]
 
 [[package]]
@@ -3238,7 +3238,7 @@ checksum = "385a6cb71ab9ab790c5fe8d67f1645e6c450a7ce006a33de03daa956cf70a496"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.118",
+ "syn 2.0.119",
 ]
 
 [[package]]
@@ -3414,7 +3414,7 @@ checksum = "7490cfa5ec963746568740651ac6781f701c9c5ea257c58e057f3ba8cf69e8da"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.118",
+ "syn 2.0.119",
 ]
 
 [[package]]
@@ -3691,7 +3691,7 @@ dependencies = [
  "bumpalo",
  "proc-macro2",
  "quote",
- "syn 2.0.118",
+ "syn 2.0.119",
  "wasm-bindgen-shared",
 ]
 
@@ -3773,7 +3773,7 @@ checksum = "053e2e040ab57b9dc951b72c264860db7eb3b0200ba345b4e4c3b14f67855ddf"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.118",
+ "syn 2.0.119",
 ]
 
 [[package]]
@@ -3784,7 +3784,7 @@ checksum = "3f316c4a2570ba26bbec722032c4099d8c8bc095efccdc15688708623367e358"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.118",
+ "syn 2.0.119",
 ]
 
 [[package]]
@@ -3983,7 +3983,7 @@ checksum = "de844c262c8848816172cef550288e7dc6c7b7814b4ee56b3e1553f275f1858e"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.118",
+ "syn 2.0.119",
  "synstructure",
 ]
 
@@ -4004,7 +4004,7 @@ checksum = "e2e817b7b52d0c7358d3246da9d69935ebb18116b2b102b4230dac079b4862f5"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.118",
+ "syn 2.0.119",
 ]
 
 [[package]]
@@ -4024,7 +4024,7 @@ checksum = "11532158c46691caf0f2593ea8358fed6bbf68a0315e80aae9bd41fbade684a1"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.118",
+ "syn 2.0.119",
  "synstructure",
 ]
 
@@ -4045,7 +4045,7 @@ checksum = "3c50655cbb0fe3fc43170059e702f1ce5e19b84cec58dc87b037a09935c2f328"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.118",
+ "syn 2.0.119",
 ]
 
 [[package]]
@@ -4078,7 +4078,7 @@ checksum = "625dc425cab0dca6dc3c3319506e6593dcb08a9f387ea3b284dbd52a92c40555"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.118",
+ "syn 2.0.119",
 ]
 
 [[package]]
diff --git a/backend/apps/gateway/Cargo.toml b/backend/apps/gateway/Cargo.toml
index 954c9d40b..4af6958bc 100644
--- a/backend/apps/gateway/Cargo.toml
+++ b/backend/apps/gateway/Cargo.toml
@@ -25,7 +25,7 @@ tokio = { version = "1.52.3", default-features = false, features = ["rt-multi-th
 
 [dev-dependencies]
 config = { version = "0.15.23", default-features = false, features = ["yaml"] }
-syn = { version = "2.0.118", features = ["full"] }
+syn = { version = "3.0.3", features = ["full"] }
 tempfile = "3.27.0"
 
 [lints]