diff --git a/src/platforms/GitHub/DOMHelper.ts b/src/platforms/GitHub/DOMHelper.ts
index 4d2d60c..b71a51f 100644
--- a/src/platforms/GitHub/DOMHelper.ts
+++ b/src/platforms/GitHub/DOMHelper.ts
@@ -2,7 +2,7 @@ import { raiseError } from 'analytics'
 import { Clippy, ClippyClassName } from 'components/Clippy'
 import React from 'react'
 import * as s from 'superstruct'
-import { $ } from 'utils/$'
+import { $, make$ } from 'utils/$'
 import { formatClass, parseIntFromElement } from 'utils/DOMHelper'
 import { renderReact } from 'utils/general'
 import { embeddedDataStruct } from './embeddedDataStructures'
@@ -39,6 +39,7 @@ const selectors = {
       app: 'script[type="application/json"][data-target="react-app.embeddedData"]',
       reposOverview:
         '[partial-name="repos-overview"] script[type="application/json"][data-target="react-partial.embeddedData"]',
+      pullRequest: 'script[type="application/json"][data-target="react-app.embeddedData"]',
     },
   },
 }
@@ -79,7 +80,12 @@ function resolveEmbeddedReposOverviewData() {
     return getMetaFromPayload(data.props.initialPayload)
 }
 
-export function resolveEmbeddedData(): {
+export function resolveEmbeddedPullRequestData(doc: Document) {
+  const data = getDOMJSON(selectors.globalNavigation.embeddedData.pullRequest, make$(doc))
+  if (s.is(data, embeddedDataStruct.pullRequest)) return data
+}
+
+export function resolveMetaFromEmbeddedData(): {
   defaultBranch: string
   metaData: MetaData
 } | void {
@@ -87,7 +93,7 @@ export function resolveEmbeddedData(): {
 }
 
 export function resolveMeta(): Partial<MetaData> {
-  const dataFromJSON = resolveEmbeddedData()
+  const dataFromJSON = resolveMetaFromEmbeddedData()
   if (dataFromJSON) return dataFromJSON.metaData
 
   const metaData = {
diff --git a/src/platforms/GitHub/embeddedDataStructures.ts b/src/platforms/GitHub/embeddedDataStructures.ts
index 676b93e..2425b7a 100644
--- a/src/platforms/GitHub/embeddedDataStructures.ts
+++ b/src/platforms/GitHub/embeddedDataStructures.ts
@@ -65,10 +65,36 @@ const reposOverview = s.object({
     appPayload: s.unknown(),
   }),
 })
+
 const app = s.object({
   payload: repoPayload,
 })
 
+const diffSummary = s.object({
+  changeType: s.string(),
+  highestAnnotationLevel: s.nullable(s.string()),
+  isCodeowner: s.nullable(s.boolean()),
+  isManifestFile: s.boolean(),
+  isSymlink: s.boolean(),
+  isVendored: s.boolean(),
+  linesAdded: s.number(),
+  linesChanged: s.number(),
+  linesDeleted: s.number(),
+  markedAsViewed: s.boolean(),
+  path: s.string(),
+  pathDigest: s.string(),
+})
+
+export type DiffSummary = s.Infer<typeof diffSummary>
+
+const pullRequest = s.object({
+  payload: s.object({
+    pullRequestsFilesRoute: s.object({
+      diffSummaries: s.array(diffSummary),
+    }),
+  }),
+})
+
 export const embeddedDataStruct = {
   repo,
   user,
@@ -78,4 +104,5 @@ export const embeddedDataStruct = {
   repoPayload,
   reposOverview,
   app,
+  pullRequest,
 }
diff --git a/src/platforms/GitHub/getPullRequestTreeData.ts b/src/platforms/GitHub/getPullRequestTreeData.ts
index be4a1fb..1eadf5f 100644
--- a/src/platforms/GitHub/getPullRequestTreeData.ts
+++ b/src/platforms/GitHub/getPullRequestTreeData.ts
@@ -1,7 +1,13 @@
 import { map } from 'utils/map'
 import { sanitizedLocation } from 'utils/URLHelper'
 import * as API from './API'
-import { getPRDiffTotalStat, getPullRequestFilesCount, isInPullFilesPage } from './DOMHelper'
+import {
+  getPRDiffTotalStat,
+  getPullRequestFilesCount,
+  isInPullFilesPage,
+  resolveEmbeddedPullRequestData,
+} from './DOMHelper'
+import { DiffSummary } from './embeddedDataStructures'
 import { processTree } from './index'
 import { getCommentsMap } from './utils'
 
@@ -108,34 +114,10 @@ function resolveFileHashMap(docs: Document[]) {
 }
 
 function resolveDiffSummaryMap(docs: Document[]) {
-  type DiffSummary = {
-    changeType: 'MODIFIED'
-    highestAnnotationLevel: null
-    isCodeowner: null
-    isManifestFile: boolean
-    isSymlink: boolean
-    isVendored: boolean
-    linesAdded: number
-    linesChanged: number
-    linesDeleted: number
-    markedAsViewed: boolean
-    path: string
-    pathDigest: string
-  }
-
-  type PartialReactAppEmbeddedData = {
-    payload: {
-      pullRequestsFilesRoute: {
-        diffSummaries: [DiffSummary]
-      }
-    }
-  }
-
   return docs
-    .map(doc => doc.querySelector('script[data-target="react-app.embeddedData"]')?.textContent)
-    .map(element => {
+    .map(resolveEmbeddedPullRequestData)
+    .map(json => {
       try {
-        const json = element ? (JSON.parse(element) as PartialReactAppEmbeddedData) : null
         return json?.payload.pullRequestsFilesRoute.diffSummaries
       } catch (error) {
         return null
diff --git a/src/platforms/GitHub/index.ts b/src/platforms/GitHub/index.ts
index 66c0f26..42463e8 100644
--- a/src/platforms/GitHub/index.ts
+++ b/src/platforms/GitHub/index.ts
@@ -139,7 +139,7 @@ export const GitHub: Platform = {
     return metaData
   },
   async getDefaultBranchName({ userName, repoName }, accessToken) {
-    const dataFromJSON = DOMHelper.resolveEmbeddedData()
+    const dataFromJSON = DOMHelper.resolveMetaFromEmbeddedData()
     if (dataFromJSON?.defaultBranch) return dataFromJSON.defaultBranch
 
     return (await API.getRepoMeta(userName, repoName, accessToken)).default_branch