diff --git a/.github/scripts/update-prs.js b/.github/scripts/update-prs.js
new file mode 100644
index 0000000..8fcf23a
--- /dev/null
+++ b/.github/scripts/update-prs.js
@@ -0,0 +1,34 @@
+/* Fetch all open PRs and updates them with main branch.*/
+
+const updatePrs = async ({ github, context }) => {
+	const { repo, owner } = context.repo;
+	const pulls = await github.rest.pulls.list({
+		owner,
+		repo,
+		state: 'open',
+		base: 'main',
+		per_page: 100
+	});
+
+	const nonDraftPulls = pulls?.data?.filter((pr) => !pr.draft);
+	let updatedBranches = 0;
+
+	if (nonDraftPulls?.length > 0) {
+		for (const pr of nonDraftPulls) {
+			try {
+				await github.rest.pulls.updateBranch({
+					owner,
+					repo,
+					pull_number: pr.number
+				});
+				updatedBranches++;
+			} catch (e) {
+				console.error(e);
+			}
+		}
+	}
+
+	return `Updated branches: ${updatedBranches}/${nonDraftPulls.length}`;
+};
+
+export default updatePrs;
diff --git a/.github/workflows/update-prs.yml b/.github/workflows/update-prs.yml
new file mode 100644
index 0000000..389fd99
--- /dev/null
+++ b/.github/workflows/update-prs.yml
@@ -0,0 +1,24 @@
+---
+name: Update all PR branches if main gets update
+
+on:
+  push:
+    branches:
+      - "main"
+
+jobs:
+  update-prs:
+    name: Update PRs
+    runs-on: ubuntu-latest
+    steps:
+      - name: ⬇ Checkout repo
+        uses: actions/checkout@v3
+
+      - name: ⌚ Update PRs
+        id: update-prs
+        uses: actions/github-script@v6
+        with:
+          script: |
+            const { default: updatePrs } = await import('${{ github.workspace }}/.github/scripts/update-prs.js');
+            // print how many PRs are updated
+            console.log(await updatePrs({github, context}));