diff --git a/app/config.sh b/app/config.sh
index a0ec810157..7421432718 100644
--- a/app/config.sh
+++ b/app/config.sh
@@ -1,7 +1,7 @@
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
 # Version of Gecko to build with
-GECKO_VERSION_MAC="128.7.0esr"
+GECKO_VERSION_MAC="140.0esr"
 GECKO_VERSION_LINUX="140.0esr"
 GECKO_VERSION_WIN="128.6.0esr"
 RUST_VERSION=1.86.0
diff --git a/app/mac/zotero.xz b/app/mac/zotero.xz
index 83c54e96ea..3ce40d56a3 100755
Binary files a/app/mac/zotero.xz and b/app/mac/zotero.xz differ