diff --git a/package-lock.json b/package-lock.json
index 2410adb..7b3990e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -107,7 +107,8 @@
     "bson": {
       "version": "1.0.4",
       "resolved": "https://registry.npmjs.org/bson/-/bson-1.0.4.tgz",
-      "integrity": "sha1-k8ENOeqltYQVy8QFLz5T5WKwtyw="
+      "integrity": "sha1-k8ENOeqltYQVy8QFLz5T5WKwtyw=",
+      "optional": true
     },
     "buffer-shims": {
       "version": "1.0.0",
@@ -725,6 +726,12 @@
       "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
       "integrity": "sha1-hxDXrwqmJvj/+hzgAWhUUmMlV0g="
     },
+    "memory-pager": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/memory-pager/-/memory-pager-1.5.0.tgz",
+      "integrity": "sha512-ZS4Bp4r/Zoeq6+NLJpP+0Zzm0pR8whtGPf1XExKLJBAczGMnSi3It14OiNCStjQjM6NU1okjQGSxgEZN8eBYKg==",
+      "optional": true
+    },
     "merge-descriptors": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/merge-descriptors/-/merge-descriptors-1.0.1.tgz",
@@ -759,20 +766,42 @@
       "integrity": "sha1-3j+YVD2/lggr5IrRoMfNqDYwHc8="
     },
     "mongodb": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-3.0.2.tgz",
-      "integrity": "sha512-E50FmpSQchZAimn2uPIegoNoH9UQYR1yiGHtQPmmg8/Ekc97w6owHoqaBoz+assnd9V5LxMzmQ/VEWMsQMgZhQ==",
+      "version": "3.1.13",
+      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-3.1.13.tgz",
+      "integrity": "sha512-sz2dhvBZQWf3LRNDhbd30KHVzdjZx9IKC0L+kSZ/gzYquCF5zPOgGqRz6sSCqYZtKP2ekB4nfLxhGtzGHnIKxA==",
       "requires": {
-        "mongodb-core": "3.0.2"
+        "mongodb-core": "3.1.11",
+        "safe-buffer": "^5.1.2"
+      },
+      "dependencies": {
+        "safe-buffer": {
+          "version": "5.2.1",
+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+          "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ=="
+        }
       }
     },
     "mongodb-core": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/mongodb-core/-/mongodb-core-3.0.2.tgz",
-      "integrity": "sha512-p1B0qwFQUw6C1OlFJnrOJp8KaX7MuGoogRbTaupRt0y+pPRkMllHWtE9V6i1CDtTvI3/3sy2sQwqWez7zuXEAA==",
+      "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": "1.0.4",
-        "require_optional": "1.0.1"
+        "bson": "^1.1.0",
+        "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=="
+        },
+        "safe-buffer": {
+          "version": "5.2.1",
+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+          "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ=="
+        }
       }
     },
     "ms": {
@@ -937,6 +966,15 @@
       "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.1.tgz",
       "integrity": "sha512-kKvNJn6Mm93gAczWVJg7wH+wGYWNrDHdWvpUmHyEsgCtIwwo3bqPtV4tR5tuPaUhTOo/kvhVwd8XwwOllGYkbg=="
     },
+    "saslprep": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/saslprep/-/saslprep-1.0.3.tgz",
+      "integrity": "sha512-/MY/PEMbk2SuY5sScONwhUDsV2p77Znkb/q3nSVstq/yQzYJOH/Azh29p9oJLsl3LnQwSvZDKagDGBsBwSooag==",
+      "optional": true,
+      "requires": {
+        "sparse-bitfield": "^3.0.3"
+      }
+    },
     "seenreq": {
       "version": "0.1.14",
       "resolved": "https://registry.npmjs.org/seenreq/-/seenreq-0.1.14.tgz",
@@ -1041,6 +1079,15 @@
         "hoek": "4.2.1"
       }
     },
+    "sparse-bitfield": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/sparse-bitfield/-/sparse-bitfield-3.0.3.tgz",
+      "integrity": "sha1-/0rm5oZWBWuks+eSqzM004JzyhE=",
+      "optional": true,
+      "requires": {
+        "memory-pager": "^1.0.2"
+      }
+    },
     "sshpk": {
       "version": "1.13.1",
       "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.13.1.tgz",
diff --git a/package.json b/package.json
index 950205d..c0b863e 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
     "express": "^4.16.3",
     "html-to-text": "^4.0.0",
     "isodate": "^0.1.4",
-    "mongodb": "^3.0.2",
+    "mongodb": "^3.1.13",
     "striptags": "^3.1.1",
     "twitter": "^1.7.1"
   }