diff --git a/app/config.sh b/app/config.sh
index 9725d34d8a..5066fab79e 100644
--- a/app/config.sh
+++ b/app/config.sh
@@ -1,9 +1,9 @@
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
 # Version of Gecko to build with
-GECKO_VERSION_MAC="115.4.0esr"
-GECKO_VERSION_LINUX="115.5.0esr"
-GECKO_VERSION_WIN="115.5.0esr"
+GECKO_VERSION_MAC="115.9.1esr"
+GECKO_VERSION_LINUX="115.9.1esr"
+GECKO_VERSION_WIN="115.9.1esr"
 RUST_VERSION=1.69.0
 
 # URL prefix for custom builds of Firefox components
diff --git a/app/mac/zotero.xz b/app/mac/zotero.xz
index 09aab5b34d..68b5691df2 100755
Binary files a/app/mac/zotero.xz and b/app/mac/zotero.xz differ