diff --git a/frontend/src/app/main/ui/workspace/tokens/style_dictionary.cljs b/frontend/src/app/main/ui/workspace/tokens/style_dictionary.cljs
index 104ee9c2d..7b6393648 100644
--- a/frontend/src/app/main/ui/workspace/tokens/style_dictionary.cljs
+++ b/frontend/src/app/main/ui/workspace/tokens/style_dictionary.cljs
@@ -17,7 +17,7 @@
   (do
     (sd-transforms/registerTransforms sd)
     (.registerFormat sd #js {:name "custom/json"
-                             :format (fn [res]
+                             :format (fn [^js res]
                                        (.-tokens (.-dictionary res)))})
     sd))