diff --git a/packages/trilean-regex/package.json b/packages/trilean-regex/package.json
index bf47290..a6239f3 100644
--- a/packages/trilean-regex/package.json
+++ b/packages/trilean-regex/package.json
@@ -87,6 +87,6 @@
     "turbo": "^2.10.12",
     "typescript": "^6.0.3",
     "typescript-eslint": "^8.68.0",
-    "vitest": "^4.1.11"
+    "vitest": "^5.0.0"
   }
 }