diff --git a/package-lock.json b/package-lock.json
index fbb3767..147cde7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -31,7 +31,7 @@
         "jest": "^26.0.1",
         "mockgoose": "^8.0.4",
         "mongodb": "^2.2.11",
-        "mongodb-memory-server": "^6.9.6",
+        "mongodb-memory-server": "6.9.6",
         "mongoist": "^2.5.5",
         "mongoose": "5.11.10",
         "prettier": "^1.19.1",