diff --git a/config/sync/core.extension.yml b/config/sync/core.extension.yml
index 0c40fad..3ecc16f 100644
--- a/config/sync/core.extension.yml
+++ b/config/sync/core.extension.yml
@@ -144,4 +144,5 @@ theme:
   octavia: 0
   geofresco: 0
   claro: 0
+  stable9: 0
 profile: minimal