diff --git a/polygerrit-ui/app/styles/gr-modal-styles.ts b/polygerrit-ui/app/styles/gr-modal-styles.ts
index b1bcf51..a8b5dc4 100644
--- a/polygerrit-ui/app/styles/gr-modal-styles.ts
+++ b/polygerrit-ui/app/styles/gr-modal-styles.ts
@@ -28,3 +28,13 @@
     opacity: var(--modal-opacity, 0.6);
   }
 `;
+
+const $_documentContainer = document.createElement('template');
+$_documentContainer.innerHTML = `<dom-module id="gr-modal-styles">
+  <template>
+    <style>
+      ${modalStyles.cssText}
+    </style>
+  </template>
+</dom-module>`;
+document.head.appendChild($_documentContainer.content);