diff --git a/decimal.js b/decimal.js
index aeb59dc..ef253db 100644
--- a/decimal.js
+++ b/decimal.js
@@ -2,7 +2,7 @@
   'use strict';
 
 
-  /*
+  /*!
    *  decimal.js v10.3.1
    *  An arbitrary-precision Decimal type for JavaScript.
    *  https://github.com/MikeMcl/decimal.js
diff --git a/decimal.mjs b/decimal.mjs
index 2020617..7441dd6 100644
--- a/decimal.mjs
+++ b/decimal.mjs
@@ -1,4 +1,4 @@
-/*
+/*!
  *  decimal.js v10.3.1
  *  An arbitrary-precision Decimal type for JavaScript.
  *  https://github.com/MikeMcl/decimal.js