diff --git a/packages/rx-react/package.json b/packages/rx-react/package.json
index 9e5c80c..a7e0a37 100644
--- a/packages/rx-react/package.json
+++ b/packages/rx-react/package.json
@@ -21,7 +21,7 @@
   "keywords": [],
   "author": "Effect contributors",
   "license": "MIT",
-  "sideEffects": false,
+  "sideEffects": [],
   "devDependencies": {
     "@types/react": "^18.3.3",
     "@types/scheduler": "^0.23.0",
diff --git a/packages/rx-vue/package.json b/packages/rx-vue/package.json
index 56a6678..db14b84 100644
--- a/packages/rx-vue/package.json
+++ b/packages/rx-vue/package.json
@@ -21,7 +21,7 @@
   "keywords": [],
   "author": "Effect contributors",
   "license": "MIT",
-  "sideEffects": false,
+  "sideEffects": [],
   "devDependencies": {
     "effect": "^3.6.1",
     "vue": "^3.4.35"
diff --git a/packages/rx/package.json b/packages/rx/package.json
index c1e1812..77940f2 100644
--- a/packages/rx/package.json
+++ b/packages/rx/package.json
@@ -22,7 +22,7 @@
   "keywords": [],
   "author": "Effect contributors",
   "license": "MIT",
-  "sideEffects": false,
+  "sideEffects": [],
   "devDependencies": {
     "effect": "^3.6.1"
   },