diff --git a/src/kaiku.ts b/src/kaiku.ts
index 9bda4a8..5d6b390 100644
--- a/src/kaiku.ts
+++ b/src/kaiku.ts
@@ -1089,7 +1089,7 @@ const runLazyPropUpdate = <T>(propUpdate: LazyPropUpdate<T>) => {
       case 'className': {
         updateElementClassName(
           propUpdate.element_ as HTMLElement,
-          value as ClassNames
+          value as any
         )
         break
       }