diff --git a/Cargo.lock b/Cargo.lock
index 19a7bbdd46..e2880d7151 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3498,9 +3498,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.107"
+version = "1.0.109"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1f4064b5b16e03ae50984a5a8ed5d4f8803e6bc1fd170a3cda91a1be4b18e3f5"
+checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/cli/Cargo.toml b/cli/Cargo.toml
index 1bf0fd861d..b84667f25b 100644
--- a/cli/Cargo.toml
+++ b/cli/Cargo.toml
@@ -36,7 +36,7 @@ frame-metadata = { version = "15.0.0", features = ["v14", "std"] }
 # decode bytes into the metadata types
 scale = { package = "parity-scale-codec", version = "3.0.0", default-features = false }
 # generate the item mod for codegen
-syn = "1.0.80"
+syn = "1.0.109"
 # communicate with the substrate nodes
 jsonrpsee = { version = "0.16.0", features = ["async-client", "client-ws-transport", "http-client"] }
 # async runtime
diff --git a/codegen/Cargo.toml b/codegen/Cargo.toml
index 80ae7d18b9..03448c3f0c 100644
--- a/codegen/Cargo.toml
+++ b/codegen/Cargo.toml
@@ -20,7 +20,7 @@ heck = "0.4.1"
 proc-macro2 = "1.0.51"
 proc-macro-error = "1.0.4"
 quote = "1.0.8"
-syn = "1.0.58"
+syn = "1.0.109"
 scale-info = "2.0.0"
 subxt-metadata = { version = "0.27.1", path = "../metadata" }
 jsonrpsee = { version = "0.16.0", features = ["async-client", "client-ws-transport", "http-client"] }
diff --git a/macro/Cargo.toml b/macro/Cargo.toml
index 06adf1074e..942279ddb4 100644
--- a/macro/Cargo.toml
+++ b/macro/Cargo.toml
@@ -19,6 +19,6 @@ proc-macro = true
 [dependencies]
 darling = "0.14.3"
 proc-macro-error = "1.0.4"
-syn = "1.0.58"
+syn = "1.0.109"
 
 subxt-codegen = { path = "../codegen", version = "0.27.1" }
diff --git a/testing/integration-tests/Cargo.toml b/testing/integration-tests/Cargo.toml
index d14f170d92..7fcbd07cb6 100644
--- a/testing/integration-tests/Cargo.toml
+++ b/testing/integration-tests/Cargo.toml
@@ -26,7 +26,7 @@ scale-info = { version = "2.0.0", features = ["bit-vec"] }
 sp-core = { version = "16.0.0", default-features = false }
 sp-keyring = "18.0.0"
 sp-runtime = "18.0.0"
-syn = "1.0.0"
+syn = "1.0.109"
 subxt = { version = "0.27.1", path = "../../subxt" }
 subxt-codegen = { version = "0.27.1", path = "../../codegen" }
 test-runtime = { path = "../test-runtime" }