diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2b76943dc..0b85cae66 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,23 @@
 
 [1]: https://www.npmjs.com/package/@google-cloud/firestore?activeTab=versions
 
+## [8.4.0](https://github.com/googleapis/nodejs-firestore/compare/v8.3.0...v8.4.0) (2026-02-27)
+
+
+### Features
+
+* Add `isType` expression ([#2483](https://github.com/googleapis/nodejs-firestore/issues/2483)) ([920c9f7](https://github.com/googleapis/nodejs-firestore/commit/920c9f769dc63d2484c95a2c791dec135a5e3eff))
+* Add first, last, arrayAgg and arrayAggDistinct expressions ([#2494](https://github.com/googleapis/nodejs-firestore/issues/2494)) ([a1c66d1](https://github.com/googleapis/nodejs-firestore/commit/a1c66d125f42093d5b86354221e88ad1b4391c23))
+* Add pipeline string expressions ([#2479](https://github.com/googleapis/nodejs-firestore/issues/2479)) ([1068f5c](https://github.com/googleapis/nodejs-firestore/commit/1068f5cb841ae22c333ecc5ba7b1ab9071d80037))
+* Add rand and trunc expressions ([#2493](https://github.com/googleapis/nodejs-firestore/issues/2493)) ([dd8897e](https://github.com/googleapis/nodejs-firestore/commit/dd8897e5329f40cdffe3f7def7cc8dd2122d633a))
+* Add remaining `map` expressions ([#2485](https://github.com/googleapis/nodejs-firestore/issues/2485)) ([4155a55](https://github.com/googleapis/nodejs-firestore/commit/4155a5526578c146019b03f25c5cf53930acbd92))
+* **firestore:** Add array expressions ([#2489](https://github.com/googleapis/nodejs-firestore/issues/2489)) ([8b5960a](https://github.com/googleapis/nodejs-firestore/commit/8b5960ac57f42506f8d8c82943c97ff8038636dc))
+
+
+### Bug Fixes
+
+* Export `regexFind` and `regexFindAll` functions to public API ([#2492](https://github.com/googleapis/nodejs-firestore/issues/2492)) ([3d61340](https://github.com/googleapis/nodejs-firestore/commit/3d61340a63d33333f1fb97f2ef9036d50740596e))
+
 ## [8.3.0](https://github.com/googleapis/nodejs-firestore/compare/v8.2.0...v8.3.0) (2026-02-02)
 
 
diff --git a/package.json b/package.json
index 92ccfa723..f36292056 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@google-cloud/firestore",
   "description": "Firestore Client Library for Node.js",
-  "version": "8.3.0",
+  "version": "8.4.0",
   "license": "Apache-2.0",
   "author": "Google Inc.",
   "engines": {
diff --git a/samples/package.json b/samples/package.json
index a050db5eb..57175909f 100644
--- a/samples/package.json
+++ b/samples/package.json
@@ -11,7 +11,7 @@
     "test": "mocha --timeout 600000"
   },
   "dependencies": {
-    "@google-cloud/firestore": "^8.3.0"
+    "@google-cloud/firestore": "^8.4.0"
   },
   "devDependencies": {
     "chai": "^4.2.0",