diff --git a/Cargo.lock b/Cargo.lock
index dcb436647b..5b40fc90aa 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3392,9 +3392,9 @@ checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
 
 [[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/crates/fj-proc/Cargo.toml b/crates/fj-proc/Cargo.toml
index 9b9fbcb845..ee6d5009b1 100644
--- a/crates/fj-proc/Cargo.toml
+++ b/crates/fj-proc/Cargo.toml
@@ -22,5 +22,5 @@ version = "1.0.152"
 optional = true
 
 [dependencies.syn]
-version = "1.0.105"
+version = "1.0.109"
 features = ["full", "extra-traits"]