diff --git a/gulpfile.js b/gulpfile.js
index 675c89d..5a73580 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -1,5 +1,7 @@
 const { src, dest, series } = require("gulp");
 
+const MAILGO_STYLE_TAG = "{{MAILGO_STYLE}}";
+
 const tsGulp = require("gulp-typescript");
 const tsProject = tsGulp.createProject("tsconfig.json");
 
@@ -33,7 +35,7 @@ function js() {
   let cssMinContent = fs.readFileSync("dist/mailgo.min.css", "utf8");
   return (
     src("src/*.ts")
-      .pipe(replace("MAILGO_STYLE", cssMinContent))
+      .pipe(replace(MAILGO_STYLE_TAG, cssMinContent))
       .pipe(tsProject())
       // .pipe(babel())
       .pipe(dest("./"))
diff --git a/src/mailgo.ts b/src/mailgo.ts
index ba88e34..b945ba4 100644
--- a/src/mailgo.ts
+++ b/src/mailgo.ts
@@ -827,7 +827,7 @@ const mailgoStyle = (): void => {
   let mailgoCSS: HTMLStyleElement = createElement("style") as HTMLStyleElement;
   mailgoCSS.id = "mailgo-style";
   mailgoCSS.type = "text/css";
-  mailgoCSS.appendChild(createTextNode(`MAILGO_STYLE`));
+  mailgoCSS.appendChild(createTextNode(`{{MAILGO_STYLE}}`));
   document.head.appendChild(mailgoCSS);
 };