diff --git a/src/wuttafarm/web/app.py b/src/wuttafarm/web/app.py
index 83c9817..5c59434 100644
--- a/src/wuttafarm/web/app.py
+++ b/src/wuttafarm/web/app.py
@@ -49,11 +49,16 @@ def main(global_config, **settings):
     app = wutta_config.get_app()
     path = app.resource_path("wuttafarm.web.static:css/wuttafarm-buefy.css")
     if os.path.exists(path):
+
         # TODO: this is not robust enough, probably..but works for me/now
         wutta_config.setdefault(
             "wuttaweb.liburl.buefy_css", "/wuttafarm/css/wuttafarm-buefy.css"
         )
 
+        # nb. ensure buefy version matches what we use for custom css
+        wutta_config.setdefault("wuttaweb.libver.buefy", "0.9.29")
+        wutta_config.setdefault("wuttaweb.libver.buefy_css", "0.9.29")
+
     # bring in the rest of WuttaFarm
     pyramid_config.include("wuttafarm.web.static")
     pyramid_config.include("wuttafarm.web.subscribers")