diff --git a/replacer.ts b/replacer.ts
index fac300a..996c341 100644
--- a/replacer.ts
+++ b/replacer.ts
@@ -127,7 +127,8 @@ const replacer = {
          const out3 =     settings.find ? out2.replaceAll(settings.find, newStr) : out2;
          const out4 =     settings.regex ? out3.replace(settings.regex, newStr) : out3;
          const out5 =     settings.noSourceMap ? out4.replace(sourceMapLine, '') : out4;
-         const final =    append && settings.header ? '\n' + out5 : out5;
+         const out6 =     out5.trimStart();
+         const final =    append && settings.header ? '\n' + out6 : out6;
          fs.mkdirSync(path.dirname(file.dest), { recursive: true });
          return append ? fs.appendFileSync(file.dest, final) : fs.writeFileSync(file.dest, final);
          };