diff --git a/.github/funding.yml b/.github/funding.yml
deleted file mode 100644
index 6675517..0000000
--- a/.github/funding.yml
+++ /dev/null
@@ -1,4 +0,0 @@
-github: sindresorhus
-open_collective: sindresorhus
-tidelift: npm/string-width
-custom: https://sindresorhus.com/donate
diff --git a/package.json b/package.json
index aea3390..239cd8e 100644
--- a/package.json
+++ b/package.json
@@ -15,6 +15,7 @@
 		"types": "./index.d.ts",
 		"default": "./index.js"
 	},
+	"sideEffects": false,
 	"engines": {
 		"node": ">=18"
 	},