diff --git a/packages/effect-fc/package.json b/packages/effect-fc/package.json
index 430a0a0..02b96ac 100644
--- a/packages/effect-fc/package.json
+++ b/packages/effect-fc/package.json
@@ -42,7 +42,7 @@
     "@effect/platform-browser": "^0.76.0",
     "@testing-library/react": "^16.3.0",
     "jsdom": "^26.1.0",
-    "vitest": "^3.2.4"
+    "vitest": "^4.0.0"
   },
   "peerDependencies": {
     "@types/react": "^19.2.0",
diff --git a/packages/effect-view/package.json b/packages/effect-view/package.json
index 6be9216..6a0a8ee 100644
--- a/packages/effect-view/package.json
+++ b/packages/effect-view/package.json
@@ -101,7 +101,7 @@
     "@testing-library/react": "^16.3.0",
     "effect": "4.0.0-beta.101",
     "jsdom": "^26.1.0",
-    "vitest": "^3.2.4"
+    "vitest": "^4.0.0"
   },
   "peerDependencies": {
     "@types/react": "^19.2.0",
diff --git a/packages/vite-plugin/package.json b/packages/vite-plugin/package.json
index efa78a5..4c3b4fe 100644
--- a/packages/vite-plugin/package.json
+++ b/packages/vite-plugin/package.json
@@ -38,7 +38,7 @@
   "devDependencies": {
     "effect-view": "workspace:*",
     "vite": "^8.0.16",
-    "vitest": "^3.2.4"
+    "vitest": "^4.0.0"
   },
   "peerDependencies": {
     "effect-view": "^0.1.0",