diff --git a/package-lock.json b/package-lock.json
index aa6449b..b365dff 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,12 +5,27 @@
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-        "negotiator": "0.6.2"
+        "mime-types": "~2.1.34",
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+          "integrity": "sha512-sPU4uV7dYlvtWJxwwxHD0PuihVNiE7TyAbQ5SWxDCB9mUYvOgroQOwYQQOKPJ8CIbE+1ETVlOoK1UC2nU3gYvg=="
+        },
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+          "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.35.tgz",
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+          }
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@@ -29,7 +44,7 @@
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+      "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg=="
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@@ -133,11 +148,18 @@
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+      "version": "0.5.4",
+      "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
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+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
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@@ -146,14 +168,14 @@
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-      "integrity": "sha512-+Hp8fLp57wnUSt0tY0tHEXh4voZRDnoIrZPqlo3DPiI4y9lwg/jqx+1Om94/W6ZaPDOUbnjOt/99w66zk+l1Xg=="
+      "version": "0.4.2",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.4.2.tgz",
+      "integrity": "sha512-aSWTXFzaKWkvHO1Ny/s+ePFpvKsPnjc551iI41v3ny/ow6tBG5Vd+FuqGNhh1LxOmVzOlGUriIlOaokOvhaStA=="
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-      "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
+      "integrity": "sha512-QADzlaHc8icV8I7vbaJXJwod9HWYp8uCqf1xa4OfNu1T7JVxQIrUgOWtHdNDtPiywmFbiS12VjotIXLrKM3orQ=="
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@@ -202,7 +224,7 @@
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-      "integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA="
+      "integrity": "sha512-3NdhDuEXnfun/z7x9GOElY49LoqVHoGScmOKwmxhsS8N5Y+Z8KyPPDnaSzqWgYt/ji4mqwfTS34Htrk0zPIXVg=="
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@@ -212,7 +234,7 @@
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-      "integrity": "sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k="
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@@ -233,7 +255,7 @@
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-      "integrity": "sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg="
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@@ -243,7 +265,7 @@
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-      "integrity": "sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc="
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@@ -260,16 +282,16 @@
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-        "body-parser": "1.19.0",
-        "content-disposition": "0.5.3",
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@@ -283,17 +305,89 @@
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-        "qs": "6.7.0",
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-        "send": "0.17.1",
-        "serve-static": "1.14.1",
-        "setprototypeof": "1.1.1",
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+        "send": "0.17.2",
+        "serve-static": "1.14.2",
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         "utils-merge": "1.0.1",
         "vary": "~1.1.2"
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+            "depd": "~1.1.2",
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+            "inherits": "2.0.4",
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+            "statuses": ">= 1.5.0 < 2",
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@@ -319,14 +413,14 @@
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-      "integrity": "sha1-mMI9qxF1ZXuMBXPozszZGw/xjIQ="
+      "version": "0.2.0",
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@@ -382,9 +476,9 @@
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@@ -464,12 +558,12 @@
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-      "integrity": "sha1-sAqqVW3YtEVoFQ7J0blT8/kMu2E="
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@@ -567,9 +661,9 @@
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@@ -708,7 +802,7 @@
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-      "integrity": "sha1-32BBeABfUi8V60SQ5yR6G/qmf4w="
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@@ -721,12 +815,12 @@
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+      "resolved": "https://registry.npmjs.org/proxy-addr/-/proxy-addr-2.0.7.tgz",
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-        "forwarded": "~0.1.2",
-        "ipaddr.js": "1.9.0"
+        "forwarded": "0.2.0",
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@@ -830,9 +924,9 @@
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+      "resolved": "https://registry.npmjs.org/send/-/send-0.17.2.tgz",
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@@ -841,30 +935,57 @@
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         "fresh": "0.5.2",
-        "http-errors": "~1.7.2",
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+            "inherits": "2.0.4",
+            "setprototypeof": "1.2.0",
+            "statuses": ">= 1.5.0 < 2",
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+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
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+        },
+        "setprototypeof": {
+          "version": "1.2.0",
+          "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.2.0.tgz",
+          "integrity": "sha512-E5LDX7Wrp85Kil5bhZv46j8jOeboKq5JMmYM3gVGdGH8xFpPWXUMsNrlODCrkoxMEeNi/XZIwuRvY4XNwYMJpw=="
+        },
+        "toidentifier": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
+          "integrity": "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA=="
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       }
     },
     "serve-static": {
-      "version": "1.14.1",
-      "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.14.1.tgz",
-      "integrity": "sha512-JMrvUwE54emCYWlTI+hGrGv5I8dEwmco/00EvkzIIsR7MqrHonbD9pO2MOfFnpFntl7ecpZs+3mW+XbQZu9QCg==",
+      "version": "1.14.2",
+      "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.14.2.tgz",
+      "integrity": "sha512-+TMNA9AFxUEGuC0z2mevogSnn9MXKb4fa7ngeRMJaaGv8vTwnIEkKi+QGvPt33HSnf8pRS+WGM0EbMtCJLKMBQ==",
       "requires": {
         "encodeurl": "~1.0.2",
         "escape-html": "~1.0.3",
         "parseurl": "~1.3.3",
-        "send": "0.17.1"
+        "send": "0.17.2"
       }
     },
     "set-blocking": {
@@ -1020,7 +1141,7 @@
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       "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
-      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
+      "integrity": "sha512-pMZTvIkT1d+TFGvDOqodOclx0QWkkgi6Tdoa8gC8ffGAAqz9pzPTZWAybbsHHoED/ztMtkv/VoYTYyShUn81hA=="
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     "validate-npm-package-license": {
       "version": "3.0.4",
diff --git a/package.json b/package.json
index b951553..186758b 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "body-parser": "^1.18.3",
     "concurrently": "^4.0.1",
     "cors": "^2.8.5",
-    "express": "^4.16.3",
+    "express": "^4.17.3",
     "mongoose": "^5.7.5",
     "path": "^0.12.7",
     "validator": "^10.8.0"