diff --git a/app/config.sh b/app/config.sh
index 75c34f2754..77292e3efb 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="140.0esr"
+GECKO_VERSION_MAC="140.3.0esr"
 GECKO_VERSION_LINUX="140.0esr"
 GECKO_VERSION_WIN="140.0esr"
 RUST_VERSION=1.86.0