diff --git a/Cargo.lock b/Cargo.lock
index 49c3a9a21841..4381e5a52636 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -11102,9 +11102,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.90"
+version = "1.0.91"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "704df27628939572cd88d33f171cd6f896f4eaca85252c6e0a72d8d8287ee86f"
+checksum = "b683b2b825c8eef438b77c36a06dc262294da3d5a5813fac20da149241dcd44d"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/node/gum/proc-macro/Cargo.toml b/node/gum/proc-macro/Cargo.toml
index a9c92b9eca82..cc8ddf22dbbf 100644
--- a/node/gum/proc-macro/Cargo.toml
+++ b/node/gum/proc-macro/Cargo.toml
@@ -12,7 +12,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 proc-macro = true
 
 [dependencies]
-syn = { version = "1.0.90", features = ["full", "extra-traits"] }
+syn = { version = "1.0.91", features = ["full", "extra-traits"] }
 quote = "1.0.17"
 proc-macro2 = "1.0.36"
 proc-macro-crate = "1.1.3"
diff --git a/node/overseer/overseer-gen/proc-macro/Cargo.toml b/node/overseer/overseer-gen/proc-macro/Cargo.toml
index c4f7c4a18bbf..5f0027b03c5e 100644
--- a/node/overseer/overseer-gen/proc-macro/Cargo.toml
+++ b/node/overseer/overseer-gen/proc-macro/Cargo.toml
@@ -12,7 +12,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 proc-macro = true
 
 [dependencies]
-syn = { version = "1.0.90", features = ["full", "extra-traits"] }
+syn = { version = "1.0.91", features = ["full", "extra-traits"] }
 quote = "1.0.17"
 proc-macro2 = "1.0.36"
 proc-macro-crate = "1.1.3"
diff --git a/xcm/procedural/Cargo.toml b/xcm/procedural/Cargo.toml
index 3b72a1556df3..0baa18024aba 100644
--- a/xcm/procedural/Cargo.toml
+++ b/xcm/procedural/Cargo.toml
@@ -10,5 +10,5 @@ proc-macro = true
 [dependencies]
 proc-macro2 = "1.0.36"
 quote = "1.0.17"
-syn = "1.0.90"
+syn = "1.0.91"
 Inflector = "0.11.4"