diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1cf9ef9..427fd02 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,14 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 
 ## [Unreleased]
 
+## [0.1.4] - 2026-05-20
+
+### Fixed
+- [#13](https://github.com/feder-cr/invisible_playwright/issues/13): every page that threw an uncaught JS error (e.g. bunny.net) crashed the Playwright client with `TypeError: Cannot read properties of undefined (reading 'url')`. Root cause: upstream Playwright Juggler added a required `location` field to the `Page.uncaughtError` event in the 2026-05-07 roll ([microsoft/playwright@c8604ec](https://github.com/microsoft/playwright/commit/c8604ecd97)); our fork was carrying the pre-roll schema in every `firefox-N` build. Fix matches upstream — Runtime.js builds the `errorLocation`, PageAgent.js forwards it on both worker and runtime error paths, Protocol.js declares the schema field. Reporter: [@dionorgua](https://github.com/dionorgua).
+
+### Changed
+- `BINARY_VERSION` bumped from `firefox-3` to `firefox-4`. JS-only change inside `chrome/juggler/`; `xul.dll` and `firefox.exe` are byte-identical to `firefox-3`.
+
 ## [0.1.3] - 2026-05-19
 
 ### Changed
diff --git a/pyproject.toml b/pyproject.toml
index 639a0f3..95e15f1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "invisible-playwright"
-version = "0.1.2"
+version = "0.1.4"
 description = "Playwright wrapper for a patched Firefox with deterministic stealth profile."
 readme = "README.md"
 requires-python = ">=3.11"
diff --git a/src/invisible_playwright/constants.py b/src/invisible_playwright/constants.py
index eef17b0..43269eb 100644
--- a/src/invisible_playwright/constants.py
+++ b/src/invisible_playwright/constants.py
@@ -7,7 +7,7 @@ bugfixes don't force a multi-hour Firefox rebuild.
 from __future__ import annotations
 
 # Bump this when a new patched Firefox build is released on GitHub.
-BINARY_VERSION: str = "firefox-3"
+BINARY_VERSION: str = "firefox-4"
 
 # Underlying Firefox version (for display only; does not drive downloads).
 FIREFOX_UPSTREAM_VERSION: str = "150.0.1"