diff --git a/.jshintrc b/.jshintrc
index f7c493b..e11b79d 100644
--- a/.jshintrc
+++ b/.jshintrc
@@ -42,7 +42,7 @@
     "boss"          : false,     // true: Tolerate assignments where comparisons would be expected
     "debug"         : false,     // true: Allow debugger statements e.g. browser breakpoints.
     "eqnull"        : false,     // true: Tolerate use of `== null`
-    "esversion"     : 6,         // {int} Specify the ECMAScript version to which the code must adhere.
+    "esversion"     : 9,         // {int} Specify the ECMAScript version to which the code must adhere.
     "moz"           : false,     // true: Allow Mozilla specific syntax (extends and overrides esnext features)
                                  // (ex: `for each`, multiple try/catch, function expression…)
     "evil"          : false,     // true: Tolerate use of `eval` and `new Function()`