diff --git a/server/package-lock.json b/server/package-lock.json
index f7969e4..5d18510 100644
--- a/server/package-lock.json
+++ b/server/package-lock.json
@@ -61,7 +61,7 @@
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           "version": "2.7.0",
-          "resolved": "http://registry.npmjs.org/acorn/-/acorn-2.7.0.tgz",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-2.7.0.tgz",
           "integrity": "sha1-q259nYhqrKiwhbwzEreaGYQz8Oc="
         }
       }
@@ -73,15 +73,23 @@
       "dev": true
     },
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-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.6.2.tgz",
-      "integrity": "sha512-FBHEW6Jf5TB9MGBgUUA9XHkTbjXYfAUjY43ACMfmdMRHniyoMHjHjzD50OK8LGDWQwp4rWEsIq5kEqq7rvIM1g==",
+      "version": "6.12.6",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
+      "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
       "dev": true,
       "requires": {
-        "fast-deep-equal": "^2.0.1",
+        "fast-deep-equal": "^3.1.1",
         "fast-json-stable-stringify": "^2.0.0",
         "json-schema-traverse": "^0.4.1",
         "uri-js": "^4.2.2"
+      },
+      "dependencies": {
+        "fast-deep-equal": {
+          "version": "3.1.3",
+          "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz",
+          "integrity": "sha512-f3qQ9oQy9j2AhBe/H9VC91wLmKBCCU/gDOnKNAYG5hswO7BLKj09Hc5HYNz9cGI++xlpDCIgDaitVs03ATR84Q==",
+          "dev": true
+        }
       }
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     "align-text": {
@@ -189,6 +197,11 @@
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       "integrity": "sha1-mrVie5PmBiH/fNrF2pczAn3x0Ms="
     },
+    "bignumber.js": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/bignumber.js/-/bignumber.js-4.1.0.tgz",
+      "integrity": "sha512-eJzYkFYy9L4JzXsbymsFn3p54D+llV27oTQ+ziJG7WFRheJcNZilgVXMG0LoZtlQSKBsJdWtLFqOD0u+U0jZKA=="
+    },
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       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.18.3.tgz",
@@ -346,7 +359,7 @@
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     "commander": {
       "version": "2.6.0",
-      "resolved": "http://registry.npmjs.org/commander/-/commander-2.6.0.tgz",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-2.6.0.tgz",
       "integrity": "sha1-nfflL7Kgyw+4kFjugMMQQiXzfh0="
     },
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@@ -407,9 +420,9 @@
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     },
     "core-util-is": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
-      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.3.tgz",
+      "integrity": "sha512-ZQBvi1DcpJ4GDqanjucZ2Hj3wEO5pZDS89BWbkcrvdxksJorwUDDZamX9ldFkp9aw2lmBDLgkObEA4DWNJ9FYQ=="
     },
     "cors": {
       "version": "2.8.5",
@@ -657,7 +670,7 @@
       "dependencies": {
         "doctrine": {
           "version": "1.5.0",
-          "resolved": "http://registry.npmjs.org/doctrine/-/doctrine-1.5.0.tgz",
+          "resolved": "https://registry.npmjs.org/doctrine/-/doctrine-1.5.0.tgz",
           "integrity": "sha1-N53Ocw9hZvds76TmcHoVmwLFpvo=",
           "dev": true,
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@@ -842,12 +855,6 @@
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-      "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-2.0.1.tgz",
-      "integrity": "sha1-ewUhjd+WZ79/Nwv3/bLLFf3Qqkk=",
-      "dev": true
-    },
     "fast-json-stable-stringify": {
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       "resolved": "https://registry.npmjs.org/fast-json-stable-stringify/-/fast-json-stable-stringify-2.0.0.tgz",
@@ -1450,17 +1457,10 @@
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       "from": "github:mysqljs/mysql",
       "requires": {
-        "bignumber.js": "7.2.1",
+        "bignumber.js": "4.1.0",
         "readable-stream": "2.3.6",
         "safe-buffer": "5.1.2",
         "sqlstring": "2.3.1"
-      },
-      "dependencies": {
-        "bignumber.js": {
-          "version": "7.2.1",
-          "resolved": "https://registry.npmjs.org/bignumber.js/-/bignumber.js-7.2.1.tgz",
-          "integrity": "sha512-S4XzBk5sMB+Rcb/LNcpzXr57VRTxgAvaAEDAl1AwRx27j00hT84O6OkteE7u8UB3NuaaygCRrEpqox4uDOrbdQ=="
-        }
       }
     },
     "natural-compare": {
@@ -1711,9 +1711,9 @@
       "dev": true
     },
     "process-nextick-args": {
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-      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.0.tgz",
-      "integrity": "sha512-MtEC1TqN0EU5nephaJ4rAtThHtC86dNN9qCuEhtshvpVBkAW5ZO7BASN9REnF9eoXGcRub+pFuKEpOHE+HbEMw=="
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
+      "integrity": "sha512-3ouUOpQhtgrbOa17J7+uxOTpITYWaGP7/AhoR3+A+/1e9skrzelGi/dXzEYyvbxubEF6Wn2ypscTKiKJFFn1ag=="
     },
     "progress": {
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@@ -2145,7 +2145,7 @@
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         "source-map": {
           "version": "0.1.43",
-          "resolved": "http://registry.npmjs.org/source-map/-/source-map-0.1.43.tgz",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.1.43.tgz",
           "integrity": "sha1-wkvBRspRfBRx9drL4lcbK3+eM0Y=",
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@@ -2153,7 +2153,7 @@
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         "uglify-js": {
           "version": "2.2.5",
-          "resolved": "http://registry.npmjs.org/uglify-js/-/uglify-js-2.2.5.tgz",
+          "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-2.2.5.tgz",
           "integrity": "sha1-puAqcNg5eSuXgEiLe4sYTAlcmcc=",
           "requires": {
             "optimist": "~0.3.5",
@@ -2283,7 +2283,7 @@
       "dependencies": {
         "acorn": {
           "version": "1.2.2",
-          "resolved": "http://registry.npmjs.org/acorn/-/acorn-1.2.2.tgz",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-1.2.2.tgz",
           "integrity": "sha1-yM4n3grMdtiW0rH6099YjZ6C8BQ="
         }
       }