diff --git a/Cargo.lock b/Cargo.lock
index a74afaf13..888a742f3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1141,7 +1141,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "serde",
- "syn 1.0.109",
+ "syn 2.0.10",
 ]
 
 [[package]]
@@ -3095,7 +3095,7 @@ checksum = "e801c1712f48475582b7696ac71e0ca34ebb30e09338425384269d9717c62cad"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.3",
+ "syn 2.0.10",
 ]
 
 [[package]]
@@ -3357,9 +3357,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.3"
+version = "2.0.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e8234ae35e70582bfa0f1fedffa6daa248e41dd045310b19800c4a36382c8f60"
+checksum = "5aad1363ed6d37b84299588d62d3a7d95b5a5c2d9aad5c85609fda12afaa1f40"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3412,7 +3412,7 @@ checksum = "f9456a42c5b0d803c8cd86e73dd7cc9edd429499f37a3550d286d5e86720569f"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.3",
+ "syn 2.0.10",
 ]
 
 [[package]]
diff --git a/crates/fj-proc/Cargo.toml b/crates/fj-proc/Cargo.toml
index 1bb116539..4d97e5908 100644
--- a/crates/fj-proc/Cargo.toml
+++ b/crates/fj-proc/Cargo.toml
@@ -22,5 +22,5 @@ version = "1.0.158"
 optional = true
 
 [dependencies.syn]
-version = "1.0.109"
+version = "2.0.10"
 features = ["full", "extra-traits"]
diff --git a/crates/fj-proc/src/lib.rs b/crates/fj-proc/src/lib.rs
index 9c43aec92..2ee7e85db 100644
--- a/crates/fj-proc/src/lib.rs
+++ b/crates/fj-proc/src/lib.rs
@@ -124,7 +124,7 @@ fn without_param_attrs(mut item: ItemFn) -> ItemFn {
             FnArg::Receiver(r) => &mut r.attrs,
             FnArg::Typed(t) => &mut t.attrs,
         };
-        attrs.retain(|attr| !attr.path.is_ident("param"));
+        attrs.retain(|attr| !attr.path().is_ident("param"));
     }
 
     item