diff --git a/package.json b/package.json
index 7e4386f9..49f4b70d 100644
--- a/package.json
+++ b/package.json
@@ -69,5 +69,6 @@
     "repository": {
       "url": "https://github.com/arlac77/npm-package-template-esm-only.git"
     }
-  }
+  },
+  "sideEffects": false
 }