diff --git a/frontend/shadow-cljs.edn b/frontend/shadow-cljs.edn
index 942e2c93d1..679a30a5dd 100644
--- a/frontend/shadow-cljs.edn
+++ b/frontend/shadow-cljs.edn
@@ -4,7 +4,6 @@
  :jvm-opts ["-Xmx700m" "-Xms100m" "-XX:+UseSerialGC" "-XX:-OmitStackTraceInFastThrow"]
  :dev-http {8888 "classpath:public"}
 
-
  :builds
  {:main
   {:target :browser
@@ -33,6 +32,7 @@
                       goog.debug.LOGGING_ENABLED true}
     :compiler-options
     {:fn-invoke-direct true
+     :optimizations #shadow/env ["PENPOT_BUILD_OPTIMIZATIONS" :as :keyword :default :advanced]
      :source-map true
      :elide-asserts true
      :anon-fn-naming-policy :off