diff --git a/.envrc b/.envrc
new file mode 100644
index 000000000..4a4726a5c
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use_nix
diff --git a/utils/domain-service.js b/utils/domain-service.js
index 14112d484..ea39701d9 100644
--- a/utils/domain-service.js
+++ b/utils/domain-service.js
@@ -44,7 +44,8 @@ const recordToEmailMx = ({ name, address, priority }) => ({
   priority,
 })
 
-const getHostKey = host => `${host.name}##${host.type}##${host.address}`;
+const getHostKey = host =>
+  `${host.name?.toLowerCase()}##${host.type.toLowerCase()}##${host.address?.toLowerCase()}`;
 
 const diffRecords = (oldRecords, newRecords) => {
   const isMatchingRecord = (a, b) => getHostKey(a) === getHostKey(b);