diff --git a/scripts/build.mjs b/scripts/build.mjs
index c1c8521..333449f 100644
--- a/scripts/build.mjs
+++ b/scripts/build.mjs
@@ -45,6 +45,8 @@ function replaceString(buildTime) {
   const replaceResult = replaceInFileSync({
     files: [
       `${buildDir}/addon/**/*.xhtml`,
+      `${buildDir}/addon/**/*.html`,
+      `${buildDir}/addon/**/*.css`,
       `${buildDir}/addon/**/*.json`,
       `${buildDir}/addon/prefs.js`,
       `${buildDir}/addon/manifest.json`,