diff --git a/nucypher-core-python/nucypher_core/umbral.pyi b/nucypher-core-python/nucypher_core/umbral.pyi
index 7ced672..14bfd9b 100644
--- a/nucypher-core-python/nucypher_core/umbral.pyi
+++ b/nucypher-core-python/nucypher_core/umbral.pyi
@@ -260,3 +260,7 @@ class ReencryptionEvidence:
 
     kfrag_validity_message_hash: bytes
     kfrag_signature_v: bool
+
+
+class VerificationError(Exception):
+    pass
\ No newline at end of file
diff --git a/nucypher-core-wasm/README.md b/nucypher-core-wasm/README.md
index bee72c7..6c22da5 100644
--- a/nucypher-core-wasm/README.md
+++ b/nucypher-core-wasm/README.md
@@ -7,4 +7,8 @@ cargo test
 make clean 
 make 
 cd examples/node && rm -rf node_modules/nucypher-core node_modules/umbral-pre && yarn install --check-files && yarn test
-```
\ No newline at end of file
+```
+
+## Bundling and releasing
+
+Bundling methods in the `Makefile` have been replaced by [`nucypher-core-wasm-bundler`](../nucypher-core-wasm-bundler/README.md). Use this new build process for updating the NPM package, `@nucypher/nucypher-core`.