diff --git a/packages/billing-client/package.json b/packages/billing-client/package.json
index ae7810f2..7b872b6a 100644
--- a/packages/billing-client/package.json
+++ b/packages/billing-client/package.json
@@ -19,6 +19,7 @@
     "test": "vitest run --pool forks"
   },
   "devDependencies": {
+    "typescript": "^5.7.3",
     "vitest": "^3.0.0"
   },
   "publishConfig": {