diff --git a/renovate.json b/renovate.json
index c48ca5eb..1734dcd8 100644
--- a/renovate.json
+++ b/renovate.json
@@ -18,6 +18,10 @@
     {
       "matchManagers": ["github-actions"],
       "groupName": "GitHub Actions"
+    },
+    {
+      "matchPackageNames": ["wasm-bindgen"],
+      "allowedVersions": "!/^0\.2\.79$/"
     }
   ]
 }
diff --git a/sxg_rs/src/crypto.rs b/sxg_rs/src/crypto.rs
index b7d794cf..c7b7dfed 100644
--- a/sxg_rs/src/crypto.rs
+++ b/sxg_rs/src/crypto.rs
@@ -36,6 +36,8 @@ pub struct EcPublicKey {
 }
 
 pub struct EcPrivateKey {
+    // Only used when --feature=rust_signer.
+    #[allow(dead_code)]
     d: Vec<u8>,
     pub public_key: EcPublicKey,
 }