diff --git a/.eslintrc.js b/.eslintrc.js
index 6176ae4..d43de31 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -26,5 +26,7 @@ module.exports = {
 
     // Allow reassigning properties of objects.
     'no-param-reassign': ['error', { props: false }],
+
+    'import/no-extraneous-dependencies': ['error', { 'devDependencies': ['gulpfile.js', 'gulp/**/*.js'] }]
   },
 };
diff --git a/gulpfile.js b/gulpfile.js
index c70a59b..4baa726 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -11,7 +11,7 @@ gulp.task('watch', gulp.series(
   'set-watching',
   gulp.parallel('css', 'scripts'),
   'copy-dist',
-  'jekyll'
+  'jekyll',
 ));
 
 gulp.task('default', gulp.series('scripts', 'css', 'test', 'copy-dist'));