diff --git a/app/routes/circulars.moderation.$circularId.$requestor.tsx b/app/routes/circulars.moderation.$circularId.$requestor.tsx
index 9c4cdfb93..fc543196d 100644
--- a/app/routes/circulars.moderation.$circularId.$requestor.tsx
+++ b/app/routes/circulars.moderation.$circularId.$requestor.tsx
@@ -132,11 +132,6 @@ export default function () {
   )
 }
 
-const methodMap = {
-  words: diffWords,
-  lines: diffLines,
-}
-
 function DiffedContent({
   oldString,
   newString,
@@ -146,10 +141,10 @@ function DiffedContent({
   newString: string
   method?: 'words' | 'lines'
 }) {
-  const diff = methodMap[method && newString ? method : 'lines'](
-    oldString ?? '',
-    newString ?? ''
-  )
+  const diff =
+    method == 'words'
+      ? diffWords(oldString, newString)
+      : diffLines(oldString, newString)
 
   return (
     <div>
diff --git a/package-lock.json b/package-lock.json
index 8ad923bcd..2ae03824e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -86,7 +86,7 @@
         "@testing-library/react": "^16.0.1",
         "@trivago/prettier-plugin-sort-imports": "^4.2.1",
         "@types/color-convert": "^2.0.4",
-        "@types/diff": "^5.2.1",
+        "@types/diff": "^6.0.0",
         "@types/grecaptcha": "^3.0.6",
         "@types/jest": "^29.5.14",
         "@types/lodash": "^4.17.13",
@@ -17093,9 +17093,9 @@
       }
     },
     "node_modules/@types/diff": {
-      "version": "5.2.1",
-      "resolved": "https://registry.npmjs.org/@types/diff/-/diff-5.2.1.tgz",
-      "integrity": "sha512-uxpcuwWJGhe2AR1g8hD9F5OYGCqjqWnBUQFD8gMZsDbv8oPHzxJF6iMO6n8Tk0AdzlxoaaoQhOYlIg/PukVU8g==",
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/@types/diff/-/diff-6.0.0.tgz",
+      "integrity": "sha512-dhVCYGv3ZSbzmQaBSagrv1WJ6rXCdkyTcDyoNu1MD8JohI7pR7k8wdZEm+mvdxRKXyHVwckFzWU1vJc+Z29MlA==",
       "dev": true
     },
     "node_modules/@types/estree": {
diff --git a/package.json b/package.json
index 6f6348100..1b6f6a588 100644
--- a/package.json
+++ b/package.json
@@ -104,7 +104,7 @@
     "@testing-library/react": "^16.0.1",
     "@trivago/prettier-plugin-sort-imports": "^4.2.1",
     "@types/color-convert": "^2.0.4",
-    "@types/diff": "^5.2.1",
+    "@types/diff": "^6.0.0",
     "@types/grecaptcha": "^3.0.6",
     "@types/jest": "^29.5.14",
     "@types/lodash": "^4.17.13",
diff --git a/sandbox-seed.json b/sandbox-seed.json
index 35534487e..d750b9b04 100644
--- a/sandbox-seed.json
+++ b/sandbox-seed.json
@@ -5153,7 +5153,8 @@
       "body": "This is an example of a request with a missing createdOn field",
       "requestor": "Example User at Example <example@example.com>",
       "requestorEmail": "example@example.com",
-      "subject": "Optical Observations for GRB 971227"
+      "subject": "Optical Observations for GRB 971227",
+      "submitter": "Example User at Example <example@example.com>"
     }
   ]
 }