diff --git a/functions/package-lock.json b/functions/package-lock.json
index 2d0cce1..c90f7f3 100644
--- a/functions/package-lock.json
+++ b/functions/package-lock.json
@@ -112,7 +112,8 @@
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@@ -173,27 +174,32 @@
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+      "integrity": "sha1-m4sMxmPWaafY9vXQiToU00jzD78=",
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@@ -202,27 +208,32 @@
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+      "integrity": "sha1-Xp4avctz/Ap8uLKR33jIy9l7h9E=",
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-      "integrity": "sha1-/yAOPnzyQp4tyvwRQIKOjMY48Ik="
+      "integrity": "sha1-/yAOPnzyQp4tyvwRQIKOjMY48Ik=",
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-        "negotiator": "0.6.1"
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+          "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.26.tgz",
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@@ -371,7 +400,8 @@
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+      "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
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@@ -381,12 +411,14 @@
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@@ -404,28 +436,30 @@
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+      "integrity": "sha512-ccav/yGvoa80BQDljCxsmmQ3Xvx60/UpBIij5QN21W3wBi/hhIC9OoO+KLpu9IJTS9j4DRVJ3aDDF9cMSoa2lw==",
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-        "raw-body": "2.3.3",
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+      "integrity": "sha1-nLFpkX7F0SwHNtPoaFdG3xyt93g=",
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-      "integrity": "sha1-DPaLud318r55YcOoUXjLhdunjLQ="
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@@ -576,9 +619,9 @@
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@@ -752,41 +805,42 @@
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@@ -1058,19 +1122,23 @@
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@@ -1078,11 +1146,13 @@
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@@ -1090,57 +1160,69 @@
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@@ -1155,6 +1237,7 @@
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@@ -1166,11 +1249,13 @@
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@@ -1178,6 +1263,7 @@
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           "bundled": true,
+          "optional": true,
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@@ -1185,6 +1271,7 @@
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@@ -1192,37 +1279,44 @@
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@@ -1231,6 +1325,7 @@
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           "bundled": true,
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           }
@@ -1238,23 +1333,27 @@
         "mkdirp": {
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           "bundled": true,
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           "dependencies": {
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@@ -1264,6 +1363,7 @@
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           "bundled": true,
+          "optional": true,
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@@ -1280,6 +1380,7 @@
         "nopt": {
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           "bundled": true,
+          "optional": true,
           "requires": {
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@@ -1287,11 +1388,13 @@
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@@ -1300,6 +1403,7 @@
         "npmlog": {
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           "bundled": true,
+          "optional": true,
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@@ -1309,30 +1413,36 @@
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@@ -1340,16 +1450,19 @@
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+          "optional": true,
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@@ -1360,6 +1473,7 @@
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           "bundled": true,
+          "optional": true,
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@@ -1370,6 +1484,7 @@
         "readable-stream": {
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           "bundled": true,
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@@ -1383,37 +1498,45 @@
         "rimraf": {
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@@ -1423,6 +1546,7 @@
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+          "optional": true,
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@@ -1430,17 +1554,20 @@
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         "strip-json-comments": {
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@@ -1453,22 +1580,26 @@
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         "wrappy": {
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@@ -1486,6 +1617,7 @@
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@@ -2192,12 +2355,14 @@
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@@ -2235,18 +2400,38 @@
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+      "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.0.tgz",
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-        "mime-types": "~2.1.18"
+        "mime-types": "~2.1.24"
+      },
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+        "mime-db": {
+          "version": "1.43.0",
+          "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.43.0.tgz",
+          "integrity": "sha512-+5dsGEEovYbT8UY9yD7eE4XTc4UwJ1jBYlgaQQF38ENsKR3wj/8q8RFZrF9WIZpB2V1ArTVFUva8sAul1NzRzQ=="
+        },
+        "mime-types": {
+          "version": "2.1.26",
+          "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.26.tgz",
+          "integrity": "sha512-01paPWYgLrkqAyrlDorC1uDwl2p3qZT7yl806vW7DvDoxwXi46jsjFbg+WdwotBIk6/MbEhO/dh5aZ5sNj/dWQ==",
+          "requires": {
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+          }
+        }
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@@ -2272,7 +2457,8 @@
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-      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
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@@ -2282,7 +2468,8 @@
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+      "optional": true
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@@ -2292,7 +2479,8 @@
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+      "optional": true
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@@ -2311,12 +2499,14 @@
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-      "integrity": "sha1-+OGqHuWlPsW/FR/6CXQqatdpeHY="
+      "integrity": "sha1-+OGqHuWlPsW/FR/6CXQqatdpeHY=",
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       "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
+      "optional": true,
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@@ -2325,7 +2515,8 @@
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-      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
+      "optional": true
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@@ -2341,7 +2532,8 @@
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-      "integrity": "sha1-SWsswQnsqNus/i3HK2A8F8WHCtQ="
+      "integrity": "sha1-SWsswQnsqNus/i3HK2A8F8WHCtQ=",
+      "optional": true
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@@ -2356,17 +2548,20 @@
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-      "integrity": "sha1-bRX7qITAhnnA136I53WegR4H+kE="
+      "integrity": "sha1-bRX7qITAhnnA136I53WegR4H+kE=",
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+      "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A==",
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       "resolved": "https://registry.npmjs.org/yargs/-/yargs-3.32.0.tgz",
       "integrity": "sha1-AwiOnr+edWtpdRYR0qXvWRSCyZU=",
+      "optional": true,
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diff --git a/functions/package.json b/functions/package.json
index 35ac824..1c8a2a8 100644
--- a/functions/package.json
+++ b/functions/package.json
@@ -9,7 +9,7 @@
     "logs": "firebase functions:log"
   },
   "dependencies": {
-    "express": "^4.16.4",
+    "express": "^4.17.1",
     "firebase-admin": "~7.0.0",
     "firebase-functions": "^2.2.1"
   },