diff --git a/firestore-bigquery-export/firestore-bigquery-change-tracker/CHANGELOG.md b/firestore-bigquery-export/firestore-bigquery-change-tracker/CHANGELOG.md
index 563eb324b5..f9e5809490 100644
--- a/firestore-bigquery-export/firestore-bigquery-change-tracker/CHANGELOG.md
+++ b/firestore-bigquery-export/firestore-bigquery-change-tracker/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 2.1.1
+
+- `firebase-admin` 14 is accepted alongside 13. With the previous `^13.2.0` range a consumer on 14 installed a second copy of the SDK under this package, and that copy never sees the consumer's `initializeApp()`, so every backup write to `backupTableId` failed with "The default Firebase app does not exist" and the rows were lost.
+
 ## 2.1.0
 
 Insert-failure semantics changed. Since 2020, the retry guard in `insertData` was broken (an un-awaited async check that was always truthy), so every failed insert was retried with `ignoreUnknownValues: true` and reported success while silently dropping any field BigQuery did not recognise.
diff --git a/firestore-bigquery-export/firestore-bigquery-change-tracker/package-lock.json b/firestore-bigquery-export/firestore-bigquery-change-tracker/package-lock.json
index 0c294b8b6b..b52fb114e5 100644
--- a/firestore-bigquery-export/firestore-bigquery-change-tracker/package-lock.json
+++ b/firestore-bigquery-export/firestore-bigquery-change-tracker/package-lock.json
@@ -1,17 +1,17 @@
 {
   "name": "@firebaseextensions/firestore-bigquery-change-tracker",
-  "version": "2.1.0",
+  "version": "2.1.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@firebaseextensions/firestore-bigquery-change-tracker",
-      "version": "2.1.0",
+      "version": "2.1.1",
       "license": "Apache-2.0",
       "dependencies": {
         "@google-cloud/bigquery": "^7.6.0",
         "@google-cloud/resource-manager": "^5.1.0",
-        "firebase-admin": "^13.2.0",
+        "firebase-admin": "^13.2.0 || ^14.0.0",
         "firebase-functions": "^6.3.2",
         "sql-formatter": "^2.3.3",
         "traverse": "^0.6.6"
diff --git a/firestore-bigquery-export/firestore-bigquery-change-tracker/package.json b/firestore-bigquery-export/firestore-bigquery-change-tracker/package.json
index 3466e92321..4758ea657e 100644
--- a/firestore-bigquery-export/firestore-bigquery-change-tracker/package.json
+++ b/firestore-bigquery-export/firestore-bigquery-change-tracker/package.json
@@ -5,7 +5,7 @@
     "url": "git+https://github.com/firebase/extensions.git",
     "directory": "firestore-bigquery-export/firestore-bigquery-change-tracker"
   },
-  "version": "2.1.0",
+  "version": "2.1.1",
   "description": "Core change-tracker library for Cloud Firestore Collection BigQuery Exports",
   "main": "./lib/index.js",
   "scripts": {
@@ -25,7 +25,7 @@
   "dependencies": {
     "@google-cloud/bigquery": "^7.6.0",
     "@google-cloud/resource-manager": "^5.1.0",
-    "firebase-admin": "^13.2.0",
+    "firebase-admin": "^13.2.0 || ^14.0.0",
     "firebase-functions": "^6.3.2",
     "sql-formatter": "^2.3.3",
     "traverse": "^0.6.6"