diff --git a/dist/index.js b/dist/index.js
index 8f8f9c2..bcc8b32 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -30257,7 +30257,12 @@ async function addComments(issues, prDiff, githubToken, identifier, owner, repo,
         return;
     }
     (0, core_1.debug)('Sending comments');
-    await octokit.rest.pulls.createReview({ owner, repo, pull_number: prNumber, event: 'COMMENT', comments });
+    try {
+        await octokit.rest.pulls.createReview({ owner, repo, pull_number: prNumber, event: 'COMMENT', comments });
+    }
+    catch (error) {
+        (0, core_1.warning)(`Failed to post the comments as a review: ${error instanceof Error ? error.message : String(error)}`);
+    }
     (0, core_1.debug)('Sent comments');
 }
 function decodeDiff(data) {
@@ -30271,7 +30276,8 @@ function decodeDiff(data) {
 }
 async function getPrDiff(githubToken, owner, repo, prNumber) {
     const octokit = (0, github_1.getOctokit)(githubToken);
-    return decodeDiff((await octokit.rest.pulls.get({ owner, repo, pull_number: prNumber, mediaType: { format: 'diff' } })).data);
+    const { base, head } = (await octokit.rest.pulls.get({ owner, repo, pull_number: prNumber })).data;
+    return decodeDiff((await octokit.rest.repos.compareCommits({ owner, repo, base: base.sha, head: head.sha, mediaType: { format: 'diff' } })).data);
 }
 function parseDiffLines(diff) {
     const diffLines = {};
diff --git a/src/bugalint.ts b/src/bugalint.ts
index a8b0d59..8876e37 100644
--- a/src/bugalint.ts
+++ b/src/bugalint.ts
@@ -367,7 +367,11 @@ export async function addComments(
     return
   }
   debug('Sending comments')
-  await octokit.rest.pulls.createReview({ owner, repo, pull_number: prNumber, event: 'COMMENT', comments })
+  try {
+    await octokit.rest.pulls.createReview({ owner, repo, pull_number: prNumber, event: 'COMMENT', comments })
+  } catch (error) {
+    warning(`Failed to post the comments as a review: ${error instanceof Error ? error.message : String(error)}`)
+  }
   debug('Sent comments')
 }
 
@@ -385,7 +389,8 @@ function decodeDiff(data: unknown): string {
 
 export async function getPrDiff(githubToken: string, owner: string, repo: string, prNumber: number): Promise<string> {
   const octokit = getOctokit(githubToken)
-  return decodeDiff((await octokit.rest.pulls.get({ owner, repo, pull_number: prNumber, mediaType: { format: 'diff' } })).data)
+  const { base, head } = (await octokit.rest.pulls.get({ owner, repo, pull_number: prNumber })).data
+  return decodeDiff((await octokit.rest.repos.compareCommits({ owner, repo, base: base.sha, head: head.sha, mediaType: { format: 'diff' } })).data)
 }
 
 export function parseDiffLines(diff: string): DiffLines {