diff --git a/workshop/package-lock.json b/workshop/package-lock.json
index 3ab611f..89bb208 100644
--- a/workshop/package-lock.json
+++ b/workshop/package-lock.json
@@ -11,7 +11,7 @@
         "cookie-parser": "~1.4.4",
         "debug": "~2.6.9",
         "ejs": "^3.1.7",
-        "express": "~4.16.1",
+        "express": "~4.17.3",
         "http-errors": "~1.6.3",
         "morgan": "~1.9.1"
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@@ -69,25 +69,50 @@
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-      "integrity": "sha1-WykhmP/dVTs6DyDe0FkrlWlVyLQ=",
+      "version": "1.19.2",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.2.tgz",
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+        "bytes": "3.1.2",
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         "debug": "2.6.9",
         "depd": "~1.1.2",
-        "http-errors": "~1.6.3",
-        "iconv-lite": "0.4.23",
+        "http-errors": "1.8.1",
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-        "qs": "6.5.2",
-        "raw-body": "2.3.3",
-        "type-is": "~1.6.16"
+        "qs": "6.9.7",
+        "raw-body": "2.4.3",
+        "type-is": "~1.6.18"
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       "engines": {
         "node": ">= 0.8"
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+    "node_modules/body-parser/node_modules/http-errors": {
+      "version": "1.8.1",
+      "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-1.8.1.tgz",
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+      "dependencies": {
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+        "inherits": "2.0.4",
+        "setprototypeof": "1.2.0",
+        "statuses": ">= 1.5.0 < 2",
+        "toidentifier": "1.0.1"
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+      "engines": {
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+      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
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+    },
+    "node_modules/body-parser/node_modules/setprototypeof": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.2.0.tgz",
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+    },
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       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -98,9 +123,9 @@
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-      "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.0.0.tgz",
-      "integrity": "sha1-0ygVQE1olpn4Wk6k+odV3ROpYEg=",
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
+      "integrity": "sha512-/Nf7TyzTx6S3yRJObOAV7956r8cr2+Oj8AC5dt8wSP3BQAoeX58NoHyCU8P8zGkNXStjTSi6fzO6F0pBdcYbEg==",
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@@ -142,13 +167,35 @@
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-      "integrity": "sha1-DPaLud318r55YcOoUXjLhdunjLQ=",
+      "version": "0.5.4",
+      "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
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+      "dependencies": {
+        "safe-buffer": "5.2.1"
+      },
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         "node": ">= 0.6"
       }
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+    "node_modules/content-disposition/node_modules/safe-buffer": {
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
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+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
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@@ -201,7 +248,7 @@
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@@ -225,7 +272,7 @@
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@@ -233,49 +280,49 @@
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-      "integrity": "sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc=",
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-      "resolved": "https://registry.npmjs.org/express/-/express-4.16.4.tgz",
-      "integrity": "sha512-j12Uuyb4FMrd/qQAm6uCHAkPtO8FDTRJZBDd5D2KOL2eLaz1yUNdUB/NOIyq0iU4q4cFarsUCrnFDPBcnksuOg==",
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+      "resolved": "https://registry.npmjs.org/express/-/express-4.17.3.tgz",
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-        "body-parser": "1.18.3",
-        "content-disposition": "0.5.2",
+        "body-parser": "1.19.2",
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-        "cookie": "0.3.1",
+        "cookie": "0.4.2",
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         "encodeurl": "~1.0.2",
         "escape-html": "~1.0.3",
         "etag": "~1.8.1",
-        "finalhandler": "1.1.1",
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         "fresh": "0.5.2",
         "merge-descriptors": "1.0.1",
         "methods": "~1.1.2",
         "on-finished": "~2.3.0",
-        "parseurl": "~1.3.2",
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-        "qs": "6.5.2",
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-        "serve-static": "1.13.2",
-        "setprototypeof": "1.1.0",
-        "statuses": "~1.4.0",
-        "type-is": "~1.6.16",
+        "proxy-addr": "~2.0.7",
+        "qs": "6.9.7",
+        "range-parser": "~1.2.1",
+        "safe-buffer": "5.2.1",
+        "send": "0.17.2",
+        "serve-static": "1.14.2",
+        "setprototypeof": "1.2.0",
+        "statuses": "~1.5.0",
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@@ -284,13 +331,37 @@
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-      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.3.1.tgz",
-      "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s=",
+      "version": "0.4.2",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.4.2.tgz",
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       "engines": {
         "node": ">= 0.6"
       }
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+    "node_modules/express/node_modules/safe-buffer": {
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
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+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ]
+    },
+    "node_modules/express/node_modules/setprototypeof": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.2.0.tgz",
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@@ -319,16 +390,16 @@
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+      "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.1.2.tgz",
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         "escape-html": "~1.0.3",
         "on-finished": "~2.3.0",
-        "parseurl": "~1.3.2",
-        "statuses": "~1.4.0",
+        "parseurl": "~1.3.3",
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-      "integrity": "sha1-PYyt2Q2XZWn6g1qx+OSyOhBWBac=",
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@@ -374,9 +445,9 @@
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@@ -417,7 +488,7 @@
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-      "integrity": "sha1-hxDXrwqmJvj/+hzgAWhUUmMlV0g=",
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@@ -436,11 +507,14 @@
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+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/mime/-/mime-1.6.0.tgz",
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       "bin": {
         "mime": "cli.js"
+      },
+      "engines": {
+        "node": ">=4"
       }
     },
     "node_modules/mime-db": {
@@ -546,11 +620,14 @@
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+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.9.7.tgz",
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       "engines": {
         "node": ">=0.6"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
       }
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@@ -562,19 +639,44 @@
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-        "http-errors": "1.6.3",
-        "iconv-lite": "0.4.23",
+        "bytes": "3.1.2",
+        "http-errors": "1.8.1",
+        "iconv-lite": "0.4.24",
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+      "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-1.8.1.tgz",
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+        "inherits": "2.0.4",
+        "setprototypeof": "1.2.0",
+        "statuses": ">= 1.5.0 < 2",
+        "toidentifier": "1.0.1"
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+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
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+    },
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+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.2.0.tgz",
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@@ -586,9 +688,9 @@
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@@ -597,26 +699,56 @@
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-        "mime": "1.4.1",
-        "ms": "2.0.0",
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@@ -1123,9 +1331,9 @@
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@@ -1134,23 +1342,52 @@
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-        "mime": "1.4.1",
-        "ms": "2.0.0",
+        "http-errors": "1.8.1",
+        "mime": "1.6.0",
+        "ms": "2.1.3",
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-        "range-parser": "~1.2.0",
-        "statuses": "~1.4.0"
+        "range-parser": "~1.2.1",
+        "statuses": "~1.5.0"
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+          "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-1.8.1.tgz",
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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/inherits/-/inherits-2.0.4.tgz",
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+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
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+        },
+        "setprototypeof": {
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+          "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.2.0.tgz",
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-      "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.13.2.tgz",
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+      "version": "1.14.2",
+      "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.14.2.tgz",
+      "integrity": "sha512-+TMNA9AFxUEGuC0z2mevogSnn9MXKb4fa7ngeRMJaaGv8vTwnIEkKi+QGvPt33HSnf8pRS+WGM0EbMtCJLKMBQ==",
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         "escape-html": "~1.0.3",
-        "parseurl": "~1.3.2",
-        "send": "0.16.2"
+        "parseurl": "~1.3.3",
+        "send": "0.17.2"
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@@ -1159,9 +1396,9 @@
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-      "version": "1.4.0",
-      "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.4.0.tgz",
-      "integrity": "sha512-zhSCtt8v2NDrRlPQpCNtw/heZLtfUDqxBM1udqikb/Hbk52LK4nQSwr10u77iopCW5LsyHpuXS0GnEc48mLeew=="
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.5.0.tgz",
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       "version": "7.2.0",
@@ -1171,6 +1408,11 @@
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       }
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+      "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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       "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
@@ -1183,7 +1425,7 @@
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       "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
-      "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
+      "integrity": "sha512-pjy2bYhSsufwWlKwPc+l3cN7+wuJlK6uz0YdJEOlQDbl6jo/YlPi4mb8agUkVC8BF7V8NuzeyPNqRksA3hztKQ=="
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diff --git a/workshop/package.json b/workshop/package.json
index 8a37846..1565a27 100644
--- a/workshop/package.json
+++ b/workshop/package.json
@@ -9,7 +9,7 @@
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     "debug": "~2.6.9",
     "ejs": "^3.1.7",
-    "express": "~4.16.1",
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     "http-errors": "~1.6.3",
     "morgan": "~1.9.1"
   }