diff --git a/package-lock.json b/package-lock.json
index c24cf52fc..42cfba24f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,7 +8,7 @@
       "name": "admin",
       "version": "1.76.0",
       "dependencies": {
-        "@jac-uk/jac-kit": "4.1.46",
+        "@jac-uk/jac-kit": "4.1.47",
         "@ministryofjustice/frontend": "0.2.4",
         "@sentry/tracing": "^7.61.1",
         "@sentry/vue": "^7.61.1",
@@ -1672,9 +1672,9 @@
       }
     },
     "node_modules/@jac-uk/jac-kit": {
-      "version": "4.1.46",
-      "resolved": "https://npm.pkg.github.com/download/@jac-uk/jac-kit/4.1.46/b2cec50a1adbc5af704c36373d85e72003f8fff4",
-      "integrity": "sha512-0c5ft2rJ4adRcIRKr1YktoBYL/37E6bNO8NQdfakMEyFrU/6sNTqbuyozwibTuoloGQp6oCu+2adXrIB40lAUA==",
+      "version": "4.1.47",
+      "resolved": "https://npm.pkg.github.com/download/@jac-uk/jac-kit/4.1.47/c9a28b7777bf0c9b9b2ca8cc2b2747b7d4cd6e1b",
+      "integrity": "sha512-903Uz8sL28VbolGsygxCCusyn4qfLzWjSe5DMbYaHxZhAj6fPuxwmUmiEBxRrYrPaNkosY3anu8rdU7MKPOQEQ==",
       "dependencies": {
         "@ckeditor/ckeditor5-build-classic": "^38.1.0",
         "@ckeditor/ckeditor5-vue": "^5.1.0",
diff --git a/package.json b/package.json
index 0aa25f33f..4ef523625 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "lint-ci": "eslint . --ext .vue,.js,.jsx,.cjs,.mjs --no-fix --ignore-path .gitignore"
   },
   "dependencies": {
-    "@jac-uk/jac-kit": "4.1.46",
+    "@jac-uk/jac-kit": "4.1.47",
     "@ministryofjustice/frontend": "0.2.4",
     "@sentry/tracing": "^7.61.1",
     "@sentry/vue": "^7.61.1",
diff --git a/src/store/userInvitations.js b/src/store/userInvitations.js
index dbd40d8d6..fac71df4e 100644
--- a/src/store/userInvitations.js
+++ b/src/store/userInvitations.js
@@ -36,7 +36,7 @@ export default {
       if (!email) return null;
 
       try {
-        let firestoreRef = query(collectionRef, where('email', '==', email));
+        let firestoreRef = query(collectionRef, where('email', '==', email.toLowerCase()));
         if (status) {
           firestoreRef = query(firestoreRef, where('status', '==', status));
         }
diff --git a/src/views/Users/Invitations.vue b/src/views/Users/Invitations.vue
index 9e9d81417..fef15ce5e 100644
--- a/src/views/Users/Invitations.vue
+++ b/src/views/Users/Invitations.vue
@@ -83,6 +83,7 @@
             hint="The email must be a JAC email address."
             type="email"
             autocomplete="off"
+            :to-lower-case="true"
             required
           />
           <p