diff --git a/Cargo.lock b/Cargo.lock
index d8831b4e2..1a4d8c979 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2787,9 +2787,9 @@ checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
 
 [[package]]
 name = "syn"
-version = "1.0.98"
+version = "1.0.99"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c50aef8a904de4c23c788f104b7dddc7d6f79c647c7c8ce4cc8f73eb0ca773dd"
+checksum = "58dbef6ec655055e20b86b15a8cc6d439cca19b667537ac6a1369572d151ab13"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/crates/fj-proc/Cargo.toml b/crates/fj-proc/Cargo.toml
index c914d2800..522f88c78 100644
--- a/crates/fj-proc/Cargo.toml
+++ b/crates/fj-proc/Cargo.toml
@@ -27,7 +27,7 @@ version = "1.0.142"
 optional = true
 
 [dependencies.syn]
-version = "1.0.98"
+version = "1.0.99"
 features = ["full", "extra-traits"]
 
 [dev-dependencies]