diff --git a/macos/build/build b/macos/build/build
index b88fb80..bda951e 100755
--- a/macos/build/build
+++ b/macos/build/build
@@ -12,7 +12,7 @@ cd $dir
 
 arch=$(uname -m)
 language=$(osascript -e 'user locale of (get system info)' | sed -e 's/_/-/g')
-version="115.6.0esr"
+version="115.9.1esr"
 i2pdversion="2.50.0"
 
 ftpmirror="https://ftp.mozilla.org/pub/firefox/releases/${version}"