diff --git a/.changeset/wise-games-battle.md b/.changeset/wise-games-battle.md
new file mode 100644
index 000000000..14e2abe54
--- /dev/null
+++ b/.changeset/wise-games-battle.md
@@ -0,0 +1,5 @@
+---
+"formik": patch
+---
+
+Mark `formik` as side-effect free in `package.json`
diff --git a/packages/formik/package.json b/packages/formik/package.json
index d991b48ca..37c47935d 100644
--- a/packages/formik/package.json
+++ b/packages/formik/package.json
@@ -37,6 +37,7 @@
   "peerDependencies": {
     "react": ">=16.8.0"
   },
+  "sideEffects": false,
   "scripts": {
     "test": "tsdx test --env=jsdom",
     "test:watch": "npm run test -- --watchAll",