diff --git a/contrib/msi/build-msi-gui.sh b/contrib/msi/build-msi-gui.sh
index 0c40e27e..a09d5c3e 100644
--- a/contrib/msi/build-msi-gui.sh
+++ b/contrib/msi/build-msi-gui.sh
@@ -308,7 +308,6 @@ cat > wix.xml << EOF
         Directory="MeshInstallFolder"
         ExeCommand="mesh-ui.exe ui\index.html"
         Execute="immediate"
-        BinaryKey="WixCA"
         Impersonate="yes"
         Return="asyncNoWait"/>