diff --git a/app/config.sh b/app/config.sh
index dc9b5f85cf..9a9579a712 100644
--- a/app/config.sh
+++ b/app/config.sh
@@ -1,8 +1,8 @@
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
 # Version of Gecko to build with
-GECKO_VERSION_MAC="140.15.0esr"
-GECKO_VERSION_LINUX="140.15.0esr"
+GECKO_VERSION_MAC="140.17.0esr"
+GECKO_VERSION_LINUX="140.17.0esr"
 GECKO_VERSION_WIN="140.15.0esr"
 RUST_VERSION=1.86.0