diff --git a/Cargo.lock b/Cargo.lock
index 098e5450813..33e59ef310e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -427,7 +427,7 @@ checksum = "b9ccdd8f2a161be9bd5c023df56f1b2a0bd1d83872ae53b71a84a12c9bf6e842"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.9",
+ "syn 2.0.11",
 ]
 
 [[package]]
@@ -1214,7 +1214,7 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn 2.0.9",
+ "syn 2.0.11",
 ]
 
 [[package]]
@@ -2092,7 +2092,7 @@ dependencies = [
  "proc-macro-crate",
  "proc-macro2",
  "quote",
- "syn 2.0.9",
+ "syn 2.0.11",
 ]
 
 [[package]]
@@ -11489,7 +11489,7 @@ checksum = "4c614d17805b093df4b147b51339e7e44bf05ef59fba1e45d83500bcfb4d8585"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.9",
+ "syn 2.0.11",
 ]
 
 [[package]]
@@ -12952,9 +12952,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.9"
+version = "2.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0da4a3c17e109f700685ec577c0f85efd9b19bcf15c913985f14dc1ac01775aa"
+checksum = "21e3787bb71465627110e7d87ed4faaa36c1f61042ee67badb9e2ef173accc40"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -13071,7 +13071,7 @@ checksum = "f9456a42c5b0d803c8cd86e73dd7cc9edd429499f37a3550d286d5e86720569f"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.9",
+ "syn 2.0.11",
 ]
 
 [[package]]
diff --git a/pallets/parachain-system/proc-macro/Cargo.toml b/pallets/parachain-system/proc-macro/Cargo.toml
index e3f9487d8c1..bcb8c800cf1 100644
--- a/pallets/parachain-system/proc-macro/Cargo.toml
+++ b/pallets/parachain-system/proc-macro/Cargo.toml
@@ -9,7 +9,7 @@ description = "Proc macros provided by the parachain-system pallet"
 proc-macro = true
 
 [dependencies]
-syn = "2.0.9"
+syn = "2.0.11"
 proc-macro2 = "1.0.52"
 quote = "1.0.26"
 proc-macro-crate = "1.3.1"