diff --git a/backend/package.json b/backend/package.json
index 9c147e74f..26638bab2 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -48,7 +48,7 @@
     "cli-color": "2.0.4",
     "connect-typeorm": "2.0.0",
     "cookie": "0.7.2",
-    "diff": "5.2.0",
+    "diff": "7.0.0",
     "express-session": "1.18.1",
     "file-type": "16.5.4",
     "htmlparser2": "9.1.0",
@@ -80,7 +80,7 @@
     "@types/cli-color": "2.0.6",
     "@types/cookie": "0.6.0",
     "@types/cookie-signature": "1.1.2",
-    "@types/diff": "5.2.3",
+    "@types/diff": "6.0.0",
     "@types/express": "5.0.0",
     "@types/express-session": "1.18.0",
     "@types/jest": "29.5.13",
diff --git a/frontend/package.json b/frontend/package.json
index 004fc49f6..6ebc86f96 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -60,7 +60,7 @@
     "d3-graphviz": "5.6.0",
     "d3-selection": "3.0.0",
     "deepmerge": "4.3.1",
-    "diff": "5.2.0",
+    "diff": "7.0.0",
     "dom-serializer": "2.0.0",
     "domhandler": "5.0.3",
     "dompurify": "3.1.6",
@@ -127,7 +127,7 @@
     "@testing-library/react-hooks": "8.0.1",
     "@testing-library/user-event": "14.5.2",
     "@types/d3-graphviz": "2.6.10",
-    "@types/diff": "5.2.3",
+    "@types/diff": "6.0.0",
     "@types/dompurify": "3.0.5",
     "@types/jest": "29.5.13",
     "@types/katex": "0.16.7",
diff --git a/frontend/src/components/editor-page/sidebar/specific-sidebar-entries/revisions-sidebar-entry/revisions-modal/__snapshots__/invert-unified-patch.spec.ts.snap b/frontend/src/components/editor-page/sidebar/specific-sidebar-entries/revisions-sidebar-entry/revisions-modal/__snapshots__/invert-unified-patch.spec.ts.snap
index fdfc874c8..ef3a06ba4 100644
--- a/frontend/src/components/editor-page/sidebar/specific-sidebar-entries/revisions-sidebar-entry/revisions-modal/__snapshots__/invert-unified-patch.spec.ts.snap
+++ b/frontend/src/components/editor-page/sidebar/specific-sidebar-entries/revisions-sidebar-entry/revisions-modal/__snapshots__/invert-unified-patch.spec.ts.snap
@@ -4,20 +4,6 @@ exports[`invert unified patch inverts a patch correctly 1`] = `
 {
   "hunks": [
     {
-      "linedelimiters": [
-        "
-",
-        "
-",
-        "
-",
-        "
-",
-        "
-",
-        "
-",
-      ],
       "lines": [
         "+a",
         "+b",
diff --git a/frontend/src/components/editor-page/sidebar/specific-sidebar-entries/revisions-sidebar-entry/revisions-modal/invert-unified-patch.ts b/frontend/src/components/editor-page/sidebar/specific-sidebar-entries/revisions-sidebar-entry/revisions-modal/invert-unified-patch.ts
index 049b26f95..7976d6b48 100644
--- a/frontend/src/components/editor-page/sidebar/specific-sidebar-entries/revisions-sidebar-entry/revisions-modal/invert-unified-patch.ts
+++ b/frontend/src/components/editor-page/sidebar/specific-sidebar-entries/revisions-sidebar-entry/revisions-modal/invert-unified-patch.ts
@@ -16,13 +16,12 @@ export const invertUnifiedPatch = (parsedDiff: ParsedDiff): ParsedDiff => {
   const { oldFileName, newFileName, oldHeader, newHeader, hunks, index } = parsedDiff
 
   const newHunks: Hunk[] = hunks.map((hunk) => {
-    const { oldLines, oldStart, newLines, newStart, lines, linedelimiters } = hunk
+    const { oldLines, oldStart, newLines, newStart, lines } = hunk
     return {
       oldLines: newLines,
       oldStart: newStart,
       newLines: oldLines,
       newStart: oldStart,
-      linedelimiters: linedelimiters,
       lines: lines.map((line) => {
         if (line.startsWith('-')) {
           return `+${line.slice(1)}`
diff --git a/frontend/src/components/markdown-renderer/markdown-to-react/utils/line-content-to-line-id-mapper.ts b/frontend/src/components/markdown-renderer/markdown-to-react/utils/line-content-to-line-id-mapper.ts
index d207eea41..70c6834f4 100644
--- a/frontend/src/components/markdown-renderer/markdown-to-react/utils/line-content-to-line-id-mapper.ts
+++ b/frontend/src/components/markdown-renderer/markdown-to-react/utils/line-content-to-line-id-mapper.ts
@@ -73,7 +73,7 @@ export class LineContentToLineIdMapper {
    * @return {@link true} if the given change is neither adding nor removing lines.
    */
   private static changeIsNotChangingLines(change: LineChange): boolean {
-    return change.added === undefined && change.removed === undefined
+    return change.added === false && change.removed === false
   }
 
   /**
diff --git a/yarn.lock b/yarn.lock
index bf1a5cfb3..28ac9b4ff 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2577,7 +2577,7 @@ __metadata:
     "@types/cli-color": "npm:2.0.6"
     "@types/cookie": "npm:0.6.0"
     "@types/cookie-signature": "npm:1.1.2"
-    "@types/diff": "npm:5.2.3"
+    "@types/diff": "npm:6.0.0"
     "@types/express": "npm:5.0.0"
     "@types/express-session": "npm:1.18.0"
     "@types/jest": "npm:29.5.13"
@@ -2600,7 +2600,7 @@ __metadata:
     cli-color: "npm:2.0.4"
     connect-typeorm: "npm:2.0.0"
     cookie: "npm:0.7.2"
-    diff: "npm:5.2.0"
+    diff: "npm:7.0.0"
     eslint: "npm:8.57.1"
     eslint-config-prettier: "npm:9.1.0"
     eslint-plugin-import: "npm:2.31.0"
@@ -2715,7 +2715,7 @@ __metadata:
     "@testing-library/react-hooks": "npm:8.0.1"
     "@testing-library/user-event": "npm:14.5.2"
     "@types/d3-graphviz": "npm:2.6.10"
-    "@types/diff": "npm:5.2.3"
+    "@types/diff": "npm:6.0.0"
     "@types/dompurify": "npm:3.0.5"
     "@types/jest": "npm:29.5.13"
     "@types/katex": "npm:0.16.7"
@@ -2741,7 +2741,7 @@ __metadata:
     d3-graphviz: "npm:5.6.0"
     d3-selection: "npm:3.0.0"
     deepmerge: "npm:4.3.1"
-    diff: "npm:5.2.0"
+    diff: "npm:7.0.0"
     dom-serializer: "npm:2.0.0"
     domhandler: "npm:5.0.3"
     dompurify: "npm:3.1.6"
@@ -5268,10 +5268,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/diff@npm:5.2.3":
-  version: 5.2.3
-  resolution: "@types/diff@npm:5.2.3"
-  checksum: 10c0/dd2e99e272a7023f3e5c71099599553c7d6c9a6b9d67f202b593b8d59b0528361eba39a8674ab18eba76217b6bad8f1a09417a9a571daaf7c0f49d67d4f305e2
+"@types/diff@npm:6.0.0":
+  version: 6.0.0
+  resolution: "@types/diff@npm:6.0.0"
+  checksum: 10c0/229325cd8039de546dc370d63d62eaf5774122a616eb09cd446d479181e58e941c2983303d23ebcb405109b1b2653ab3bbfcf63a24f827e976e98c8eb83dd34f
   languageName: node
   linkType: hard
 
@@ -9353,10 +9353,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"diff@npm:5.2.0":
-  version: 5.2.0
-  resolution: "diff@npm:5.2.0"
-  checksum: 10c0/aed0941f206fe261ecb258dc8d0ceea8abbde3ace5827518ff8d302f0fc9cc81ce116c4d8f379151171336caf0516b79e01abdc1ed1201b6440d895a66689eb4
+"diff@npm:7.0.0":
+  version: 7.0.0
+  resolution: "diff@npm:7.0.0"
+  checksum: 10c0/251fd15f85ffdf814cfc35a728d526b8d2ad3de338dcbd011ac6e57c461417090766b28995f8ff733135b5fbc3699c392db1d5e27711ac4e00244768cd1d577b
   languageName: node
   linkType: hard