diff --git a/integrations/deepseek-harness/package.json b/integrations/deepseek-harness/package.json
index 03ca09617..6607b8def 100644
--- a/integrations/deepseek-harness/package.json
+++ b/integrations/deepseek-harness/package.json
@@ -67,7 +67,7 @@
     "@types/node": "^22.15.21",
     "tsup": "^8.5.1",
     "typescript": "^5.5.4",
-    "vitest": "4.1.5"
+    "vitest": "5.0.0"
   },
   "repository": {
     "type": "git",