diff --git a/package-lock.json b/package-lock.json
index dd2b879..da3cb9a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -32,6 +32,7 @@
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       "integrity": "sha1-Pa+ai2ciEpn9ro2C0RftjmyAJEs=",
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@@ -180,7 +181,7 @@
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+      "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg=="
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-      "integrity": "sha1-2sh4dxPJlmhJ/IGAd36+nB3fO4Y="
+      "integrity": "sha1-2sh4dxPJlmhJ/IGAd36+nB3fO4Y=",
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@@ -242,7 +244,8 @@
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-      "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU="
+      "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU=",
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@@ -260,7 +263,8 @@
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@@ -1764,7 +1771,8 @@
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+      "integrity": "sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw=",
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@@ -2187,9 +2198,19 @@
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-      "integrity": "sha1-DPaLud318r55YcOoUXjLhdunjLQ="
+      "version": "0.5.4",
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-      "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
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@@ -2354,7 +2377,8 @@
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+          "integrity": "sha512-v0XCLxICi9nPfYrS9RL8HbYnXi9obYAeLbSP00BmnZwCK9+Ih9WOjoZ8YoHCoav2csqn4FOz4Orldsy2dmDwmQ==",
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@@ -2563,6 +2587,7 @@
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@@ -2847,9 +2873,9 @@
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-      "integrity": "sha1-eePVhlU0aQn+bw9Fpd5oEDspTSA="
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@@ -3175,40 +3202,171 @@
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-        "parseurl": "1.3.2",
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@@ -10117,9 +10499,9 @@
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+      "integrity": "sha1-TkhM1N5aC7vuGORjB3EKioFiGHg=",
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@@ -11031,6 +11419,11 @@
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+      "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
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+    },
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@@ -11063,6 +11457,7 @@
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+          "integrity": "sha1-MAvG4OhjdPe6YQaLWx7NV/xlMto=",
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+          "optional": true,
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@@ -11108,6 +11507,7 @@
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+          "optional": true,
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@@ -11133,6 +11533,7 @@
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+      "optional": true,
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@@ -11200,6 +11601,7 @@
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       "integrity": "sha1-KcVzMUgFe7Th913zW3qcty5qWd0=",
+      "optional": true,
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@@ -11209,12 +11611,14 @@
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           "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-1.2.1.tgz",
-          "integrity": "sha1-m7UwTS4LVmmLLHWLCKPqqdqlijk="
+          "integrity": "sha1-m7UwTS4LVmmLLHWLCKPqqdqlijk=",
+          "optional": true
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           "resolved": "https://registry.npmjs.org/cliui/-/cliui-2.1.0.tgz",
           "integrity": "sha1-S0dXYP+AJkx2LDoXGQMukcf+oNE=",
+          "optional": true,
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@@ -11225,6 +11629,7 @@
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           "integrity": "sha1-9+572FfdfB0tOMDnTvvWgdFDH9E=",
+          "optional": true,
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@@ -11532,7 +11937,7 @@
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-      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
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@@ -11573,6 +11978,7 @@
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       "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
+      "optional": true,
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@@ -11872,6 +12278,98 @@
         "webpack-dev-middleware": "1.12.0"
       },
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+        "content-disposition": {
+          "version": "0.5.2",
+          "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.2.tgz",
+          "integrity": "sha512-kRGRZw3bLlFISDBgwTSA1TMBFN6J6GWDeubmDE3AF+3+yXL8hTWv8r5rkLbqYXY4RjPk/EzHnClI3zQf1cFmHA=="
+        },
+        "express": {
+          "version": "4.16.2",
+          "resolved": "https://registry.npmjs.org/express/-/express-4.16.2.tgz",
+          "integrity": "sha512-4mc9RUEAUpPMFR6gpXcnPt0/q2Zil35FTUr07ixWYX90RmUKL3jUbvTvJzkc/uL3r+A7kuWSiIqOyVUSWoZXWQ==",
+          "requires": {
+            "accepts": "~1.3.4",
+            "array-flatten": "1.1.1",
+            "body-parser": "1.18.2",
+            "content-disposition": "0.5.2",
+            "content-type": "~1.0.4",
+            "cookie": "0.3.1",
+            "cookie-signature": "1.0.6",
+            "debug": "2.6.9",
+            "depd": "~1.1.1",
+            "encodeurl": "~1.0.1",
+            "escape-html": "~1.0.3",
+            "etag": "~1.8.1",
+            "finalhandler": "1.1.0",
+            "fresh": "0.5.2",
+            "merge-descriptors": "1.0.1",
+            "methods": "~1.1.2",
+            "on-finished": "~2.3.0",
+            "parseurl": "~1.3.2",
+            "path-to-regexp": "0.1.7",
+            "proxy-addr": "~2.0.2",
+            "qs": "6.5.1",
+            "range-parser": "~1.2.0",
+            "safe-buffer": "5.1.1",
+            "send": "0.16.1",
+            "serve-static": "1.13.1",
+            "setprototypeof": "1.1.0",
+            "statuses": "~1.3.1",
+            "type-is": "~1.6.15",
+            "utils-merge": "1.0.1",
+            "vary": "~1.1.2"
+          }
+        },
+        "finalhandler": {
+          "version": "1.1.0",
+          "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.1.0.tgz",
+          "integrity": "sha512-ejnvM9ZXYzp6PUPUyQBMBf0Co5VX2gr5H2VQe2Ui2jWXNlxv+PYZo8wpAymJNJdLsG1R4p+M4aynF8KuoUEwRw==",
+          "requires": {
+            "debug": "2.6.9",
+            "encodeurl": "~1.0.1",
+            "escape-html": "~1.0.3",
+            "on-finished": "~2.3.0",
+            "parseurl": "~1.3.2",
+            "statuses": "~1.3.1",
+            "unpipe": "~1.0.0"
+          }
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+        "send": {
+          "version": "0.16.1",
+          "resolved": "https://registry.npmjs.org/send/-/send-0.16.1.tgz",
+          "integrity": "sha512-ElCLJdJIKPk6ux/Hocwhk7NFHpI3pVm/IZOYWqUmoxcgeyM+MpxHHKhb8QmlJDX1pU6WrgaHBkVNm73Sv7uc2A==",
+          "requires": {
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+            "depd": "~1.1.1",
+            "destroy": "~1.0.4",
+            "encodeurl": "~1.0.1",
+            "escape-html": "~1.0.3",
+            "etag": "~1.8.1",
+            "fresh": "0.5.2",
+            "http-errors": "~1.6.2",
+            "mime": "1.4.1",
+            "ms": "2.0.0",
+            "on-finished": "~2.3.0",
+            "range-parser": "~1.2.0",
+            "statuses": "~1.3.1"
+          }
+        },
+        "serve-static": {
+          "version": "1.13.1",
+          "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.13.1.tgz",
+          "integrity": "sha512-hSMUZrsPa/I09VYFJwa627JJkNs0NrfL1Uzuup+GqHfToR2KcsXFymXSV90hoyw3M+msjFuQly+YzIH/q0MGlQ==",
+          "requires": {
+            "encodeurl": "~1.0.1",
+            "escape-html": "~1.0.3",
+            "parseurl": "~1.3.2",
+            "send": "0.16.1"
+          }
+        },
+        "setprototypeof": {
+          "version": "1.1.0",
+          "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.1.0.tgz",
+          "integrity": "sha512-BvE/TwpZX4FXExxOxZyRGQQv651MSwmWKZGqvmPcRIjDqWub67kTKuIMx43cZZrS/cBBzwBcNDWoFxt2XEFIpQ=="
+        },
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diff --git a/package.json b/package.json
index 4c61e48..d1ea9c6 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
   "dependencies": {
     "body-parser": "^1.18.2",
     "date-fns": "^1.29.0",
-    "express": "^4.16.2",
+    "express": "^4.17.3",
     "gatsby": "^1.9.63",
     "gatsby-link": "^1.6.31",
     "gatsby-plugin-google-analytics": "^1.0.10",