diff --git a/cumulus/Cargo.lock b/cumulus/Cargo.lock
index ec29af6c67..75b896b151 100644
--- a/cumulus/Cargo.lock
+++ b/cumulus/Cargo.lock
@@ -752,7 +752,7 @@ checksum = "0e97ce7de6cf12de5d7226c73f5ba9811622f4db3a5b91b55c53e987e5f91cba"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -763,7 +763,7 @@ checksum = "a564d521dd56509c4c47480d00b80ee55f7e385ae48db5744c67ad50c92d2ebf"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -898,7 +898,7 @@ dependencies = [
  "regex",
  "rustc-hash",
  "shlex",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -1874,7 +1874,7 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -2848,7 +2848,7 @@ dependencies = [
  "proc-macro-crate",
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -3665,7 +3665,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "regex",
- "syn 2.0.25",
+ "syn 2.0.26",
  "termcolor",
  "walkdir",
 ]
@@ -3860,7 +3860,7 @@ checksum = "5e9a1f9f7d83e59740248a6e14ecf93929ade55027844dfcea78beafccc15745"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -3871,7 +3871,7 @@ checksum = "48016319042fb7c87b78d2993084a831793a897a5cd1a2a67cab9d1eeb4b7d76"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -4020,7 +4020,7 @@ dependencies = [
  "fs-err",
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -4292,7 +4292,7 @@ dependencies = [
  "proc-macro-crate",
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -4411,7 +4411,7 @@ dependencies = [
  "proc-macro-warning",
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -4423,7 +4423,7 @@ dependencies = [
  "proc-macro-crate",
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -4433,7 +4433,7 @@ source = "git+https://github.com/paritytech/substrate?branch=master#c446786a498d
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -4602,7 +4602,7 @@ checksum = "89ca545a94061b6365f2c7355b4b32bd20df3ff95f02da9329b34ccc3bd6ee72"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -6464,7 +6464,7 @@ dependencies = [
  "macro_magic_core",
  "macro_magic_macros",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -6477,7 +6477,7 @@ dependencies = [
  "macro_magic_core_macros",
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -6488,7 +6488,7 @@ checksum = "93d7d9e6e234c040dafc745c7592738d56a03ad04b1fa04ab60821deb597466a"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -6499,7 +6499,7 @@ checksum = "ffd19f13cfd2bfbd83692adfef8c244fe5109b3eb822a1fb4e0a6253b406cd81"
 dependencies = [
  "macro_magic_core",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -7627,7 +7627,7 @@ source = "git+https://github.com/paritytech/substrate?branch=master#c446786a498d
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -8306,7 +8306,7 @@ dependencies = [
  "proc-macro-crate",
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -10700,7 +10700,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1ceca8aaf45b5c46ec7ed39fff75f57290368c1846d33d24a122ca81416ab058"
 dependencies = [
  "proc-macro2",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -10776,7 +10776,7 @@ checksum = "70550716265d1ec349c41f70dd4f964b4fd88394efe4405f0c1da679c4799a07"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -11771,7 +11771,7 @@ dependencies = [
  "proc-macro-crate",
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -12694,7 +12694,7 @@ dependencies = [
  "proc-macro-crate",
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -13020,7 +13020,7 @@ checksum = "389894603bd18c46fa56231694f8d827779c0951a667087194cf9de94ed24682"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -13329,7 +13329,7 @@ dependencies = [
  "proc-macro-crate",
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -13566,7 +13566,7 @@ source = "git+https://github.com/paritytech/substrate?branch=master#c446786a498d
 dependencies = [
  "quote",
  "sp-core-hashing",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -13585,7 +13585,7 @@ source = "git+https://github.com/paritytech/substrate?branch=master#c446786a498d
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -13792,7 +13792,7 @@ dependencies = [
  "proc-macro-crate",
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -13977,7 +13977,7 @@ dependencies = [
  "parity-scale-codec",
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -14301,7 +14301,7 @@ dependencies = [
  "proc-macro-crate",
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -14350,9 +14350,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.25"
+version = "2.0.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "15e3fc8c0c74267e2df136e5e5fb656a464158aa57624053375eb9c8c6e25ae2"
+checksum = "45c3457aacde3c65315de5031ec191ce46604304d2446e803d71ade03308d970"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -14464,7 +14464,7 @@ checksum = "463fe12d7993d3b327787537ce8dd4dfa058de32fc2b195ef3cde03dc4771e8f"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -14645,7 +14645,7 @@ checksum = "630bdcf245f78637c13ec01ffae6187cca34625e8c63150d424b59e55af2675e"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -14855,7 +14855,7 @@ dependencies = [
  "proc-macro-crate",
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
@@ -16474,7 +16474,7 @@ dependencies = [
  "Inflector",
  "proc-macro2",
  "quote",
- "syn 2.0.25",
+ "syn 2.0.26",
 ]
 
 [[package]]
diff --git a/cumulus/pallets/parachain-system/proc-macro/Cargo.toml b/cumulus/pallets/parachain-system/proc-macro/Cargo.toml
index c75ac23d61..cd050838d2 100644
--- a/cumulus/pallets/parachain-system/proc-macro/Cargo.toml
+++ b/cumulus/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 = "2.0.25"
+syn = "2.0.26"
 proc-macro2 = "1.0.64"
 quote = "1.0.29"
 proc-macro-crate = "1.3.1"