diff --git a/src/invisible_playwright/constants.py b/src/invisible_playwright/constants.py
index 731d7ce..ea588eb 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-12"
+BINARY_VERSION: str = "firefox-13"
 
 # Releases known to be broken — ensure_binary() refuses them with a clear error
 # instead of handing the user an unusable binary. firefox-8 was packaged without