diff --git a/apps/agent-sdk/package.json b/apps/agent-sdk/package.json
index 8ad8c45..80ac41b 100644
--- a/apps/agent-sdk/package.json
+++ b/apps/agent-sdk/package.json
@@ -44,7 +44,7 @@
     "@types/node": "^26.1.2",
     "effect": "^3.19.15",
     "typescript": "^5.7.0",
-    "vitest": "^4.0.18"
+    "vitest": "^5.0.0"
   },
   "keywords": [
     "tx",
diff --git a/apps/cli/package.json b/apps/cli/package.json
index fe2f78b..912ec9c 100644
--- a/apps/cli/package.json
+++ b/apps/cli/package.json
@@ -113,7 +113,7 @@
     "@types/bun": "^1.2.0",
     "@types/node": "^26.1.2",
     "typescript": "^5.7.0",
-    "vitest": "^4.0.18"
+    "vitest": "^5.0.0"
   },
   "keywords": [
     "tx",
diff --git a/apps/dashboard/package.json b/apps/dashboard/package.json
index 6473311..15fba75 100644
--- a/apps/dashboard/package.json
+++ b/apps/dashboard/package.json
@@ -46,6 +46,6 @@
     "tsx": "^4.19.2",
     "typescript": "~5.9.3",
     "vite": "^8.0.1",
-    "vitest": "^4.0.18"
+    "vitest": "^5.0.0"
   }
 }
diff --git a/package.json b/package.json
index 43124e3..2a1ee7e 100644
--- a/package.json
+++ b/package.json
@@ -80,7 +80,7 @@
     "tsx": "^4.21.0",
     "turbo": "^2.8.5",
     "typescript": "^5.9.3",
-    "vitest": "^4.0.18"
+    "vitest": "^5.0.0"
   },
   "engines": {
     "node": ">=20"
diff --git a/packages/core/package.json b/packages/core/package.json
index 485c1ab..5c049fd 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -66,7 +66,7 @@
   },
   "peerDependencies": {
     "@anthropic-ai/sdk": "^0.52.0",
-    "vitest": "^4.0.18"
+    "vitest": "^5.0.0"
   },
   "peerDependenciesMeta": {
     "@anthropic-ai/sdk": {
@@ -79,7 +79,7 @@
   "devDependencies": {
     "@types/bun": "^1.2.0",
     "typescript": "^5.7.0",
-    "vitest": "^4.0.18"
+    "vitest": "^5.0.0"
   },
   "repository": {
     "type": "git",