diff --git a/src/entries/dom-api.js b/src/entries/dom-api.js
index 120afed..e9f3159 100644
--- a/src/entries/dom-api.js
+++ b/src/entries/dom-api.js
@@ -1,3 +1,8 @@
 import {document as lightJsDocument} from '@litejs/dom';
+import {CSSStyleDeclaration} from '@litejs/dom/css';
+
+CSSStyleDeclaration.prototype.setProperty = function(key, value) {
+	this[key] = value;
+};
 
 export const document = lightJsDocument;
\ No newline at end of file