diff --git a/backend/package-lock.json b/backend/package-lock.json
index c6786a5..47193c6 100644
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -558,6 +558,11 @@
       "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
       "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk="
     },
+    "denque": {
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/denque/-/denque-1.4.1.tgz",
+      "integrity": "sha512-OfzPuSZKGcgr96rf1oODnfjqBFmr1DVoc/TrItj3Ohe0Ah1C5WX5Baquw/9U9KovnQ88EqmJbD66rKYUQYN1tQ=="
+    },
     "depd": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/depd/-/depd-1.1.2.tgz",
@@ -1942,23 +1947,23 @@
       }
     },
     "mongodb": {
-      "version": "3.1.12",
-      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-3.1.12.tgz",
-      "integrity": "sha512-JJnxDoaObL+U+TLo4A17yGe7vdRK8p8dh1MqxG9V9AFTZz13WoAXSMpT1kELUIyPCNaf0S0gW1EROPhmXVCgwg==",
+      "version": "3.6.1",
+      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-3.6.1.tgz",
+      "integrity": "sha512-uH76Zzr5wPptnjEKJRQnwTsomtFOU/kQEU8a9hKHr2M7y9qVk7Q4Pkv0EQVp88742z9+RwvsdTw6dRjDZCNu1g==",
       "requires": {
-        "mongodb-core": "3.1.11",
-        "safe-buffer": "^5.1.2"
-      }
-    },
-    "mongodb-core": {
-      "version": "3.1.11",
-      "resolved": "https://registry.npmjs.org/mongodb-core/-/mongodb-core-3.1.11.tgz",
-      "integrity": "sha512-rD2US2s5qk/ckbiiGFHeu+yKYDXdJ1G87F6CG3YdaZpzdOm5zpoAZd/EKbPmFO6cQZ+XVXBXBJ660sSI0gc6qg==",
-      "requires": {
-        "bson": "^1.1.0",
+        "bl": "^2.2.0",
+        "bson": "^1.1.4",
+        "denque": "^1.4.1",
         "require_optional": "^1.0.1",
         "safe-buffer": "^5.1.2",
         "saslprep": "^1.0.0"
+      },
+      "dependencies": {
+        "bson": {
+          "version": "1.1.5",
+          "resolved": "https://registry.npmjs.org/bson/-/bson-1.1.5.tgz",
+          "integrity": "sha512-kDuEzldR21lHciPQAIulLs1LZlCXdLziXI6Mb/TDkwXhb//UORJNPXgcRs2CuO4H0DcMkpfT3/ySsP3unoZjBg=="
+        }
       }
     },
     "ms": {