diff --git a/src/ext/lib/video-data/PageInfo.js b/src/ext/lib/video-data/PageInfo.js
index f34306b..d84df85 100644
--- a/src/ext/lib/video-data/PageInfo.js
+++ b/src/ext/lib/video-data/PageInfo.js
@@ -58,22 +58,22 @@ class PageInfo {
     this.currentZoomScale = 1;
   }
 
-  injectCss(cssString) {
-    this.comms.sendMessage({
+  async injectCss(cssString) {
+    await this.comms.sendMessage({
       cmd: 'inject-css',
       cssString: cssString
     });
   }
 
-  ejectCss(cssString) {
-    this.comms.sendMessage({
+  async ejectCss(cssString) {
+    await this.comms.sendMessage({
       cmd: 'eject-css',
       cssString: cssString
     });
   }
 
-  replaceCss(oldCssString, newCssString) {
-    this.comms.sendMessage({
+  async replaceCss(oldCssString, newCssString) {
+    await this.comms.sendMessage({
       cmd: 'replace-css',
       newCssString,
       oldCssString