diff --git a/packages/core/package.json b/packages/core/package.json
index 0b44fe53..0c902e2b 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -1,6 +1,7 @@
 {
   "version": "1.0.0-beta.2",
   "name": "@tmagic/core",
+  "sideEffects": false,
   "main": "dist/tmagic-core.umd.js",
   "module": "dist/tmagic-core.es.js",
   "types": "dist/types/src/index.d.ts",
diff --git a/packages/form/package.json b/packages/form/package.json
index 1bcab77f..41a85b5a 100644
--- a/packages/form/package.json
+++ b/packages/form/package.json
@@ -1,6 +1,7 @@
 {
   "version": "1.0.0-beta.2",
   "name": "@tmagic/form",
+  "sideEffects": false,
   "main": "dist/tmagic-form.umd.js",
   "module": "dist/tmagic-form.es.js",
   "style": "dist/style.css",
diff --git a/packages/schema/package.json b/packages/schema/package.json
index 14528b11..5a47c9c0 100644
--- a/packages/schema/package.json
+++ b/packages/schema/package.json
@@ -1,6 +1,7 @@
 {
   "version": "1.0.0-beta.2",
   "name": "@tmagic/schema",
+  "sideEffects": false,
   "main": "src/index.ts",
   "engines": {
     "node": ">=14"
diff --git a/packages/stage/package.json b/packages/stage/package.json
index 28319984..eaf1469d 100644
--- a/packages/stage/package.json
+++ b/packages/stage/package.json
@@ -1,6 +1,7 @@
 {
   "version": "1.0.0-beta.2",
   "name": "@tmagic/stage",
+  "sideEffects": false,
   "main": "dist/tmagic-stage.umd.js",
   "module": "dist/tmagic-stage.es.js",
   "types": "dist/types/src/index.d.ts",
diff --git a/packages/table/package.json b/packages/table/package.json
index ee972559..88e73d70 100644
--- a/packages/table/package.json
+++ b/packages/table/package.json
@@ -1,6 +1,7 @@
 {
   "version": "1.0.0-beta.2",
   "name": "@tmagic/table",
+  "sideEffects": false,
   "main": "dist/tmagic-table.umd.js",
   "module": "dist/tmagic-table.es.js",
   "types": "dist/types/src/index.d.ts",