diff --git a/package-lock.json b/package-lock.json
index f84d8e9..3eaed70 100644
--- a/package-lock.json
+++ b/package-lock.json
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@@ -6005,39 +5996,6 @@
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@@ -6352,6 +6310,16 @@
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       "resolved": "https://registry.npmjs.org/optionator/-/optionator-0.9.1.tgz",
@@ -6775,6 +6743,13 @@
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+      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
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@@ -6919,14 +6894,19 @@
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-        "string_decoder": "^1.1.1",
-        "util-deprecate": "^1.0.1"
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+        "inherits": "~2.0.3",
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@@ -7005,6 +6985,13 @@
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+      "resolved": "https://registry.npmjs.org/require-at/-/require-at-1.0.6.tgz",
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@@ -7987,6 +7974,38 @@
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+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/bl/-/bl-4.1.0.tgz",
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+          "dev": true,
+          "requires": {
+            "buffer": "^5.5.0",
+            "inherits": "^2.0.4",
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+              "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
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+              "dev": true
+            }
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+        "readable-stream": {
+          "version": "3.6.0",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.0.tgz",
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+          "dev": true,
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     "terminal-link": {
diff --git a/package.json b/package.json
index 1a559c6..3de8656 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
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         "mongoose": "^6.0.13",
         "mongoose-findorcreate": "^3.0.0",
-        "mongoose-unique-validator": "^3.0.0",
+        "mongoose-unique-validator": "^2.0.3",
         "morgan": "^1.10.0",
         "passport": "^0.5.0",
         "passport-google-oauth": "^2.0.0",
@@ -61,7 +61,7 @@
         "eslint-plugin-prettier": "^4.0.0",
         "eslint-plugin-react": "^7.27.1",
         "jest": "^26.6.0",
-        "mongodb-memory-server": "^8",
+        "mongodb-memory-server": "^6",
         "nodemon": "^2.0.15",
         "prettier-eslint": "^13.0.0",
         "supertest": "^6.1.6"
diff --git a/src/tests/integration/utils.js b/src/tests/integration/utils.js
index 926f13f..b72f25d 100644
--- a/src/tests/integration/utils.js
+++ b/src/tests/integration/utils.js
@@ -36,7 +36,10 @@ async function clean() {
 
 const mongodbMemoryServerConfig = {
     binary: {
-        version: "5.0.3",
+        version: "4.4.10",
+    },
+    instance: {
+        args: ["--enableMajorityReadConcern=false"],
     },
 };