diff --git a/Cargo.lock b/Cargo.lock
index 02f64f7e7..8c810a040 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -802,9 +802,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.56"
+version = "1.0.67"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2b63bdb0cd06f1f4dedf69b254734f9b45af66e4a031e42a7480257d9898b435"
+checksum = "3d433d9f1a3e8c1263d9456598b16fec66f4acc9a74dacffd35c7bb09b3a1328"
 dependencies = [
  "unicode-ident",
 ]
diff --git a/tool/src/lib.rs b/tool/src/lib.rs
index 746d8af87..5a85b2ed2 100644
--- a/tool/src/lib.rs
+++ b/tool/src/lib.rs
@@ -1,3 +1,6 @@
+// Enable once https://github.com/rust-lang/rust/issues/89554 is stable
+// #![deny(non_exhaustive_omitted_patterns)] // diplomat_core uses non_exhaustive a lot; we should never miss its patterns
+
 pub mod c;
 pub mod c2;
 pub mod common;