diff --git a/package-lock.json b/package-lock.json
index ba849cf..9a46228 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1632,9 +1632,9 @@
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+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-4.2.3.tgz",
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@@ -3808,26 +3808,18 @@
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-      "resolved": "https://registry.npmjs.org/html-minifier/-/html-minifier-3.5.21.tgz",
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-      "dev": true,
-      "requires": {
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-        "clean-css": "4.2.x",
-        "commander": "2.17.x",
-        "he": "1.2.x",
-        "param-case": "2.1.x",
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-        "uglify-js": "3.4.x"
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-          "resolved": "https://registry.npmjs.org/commander/-/commander-2.17.1.tgz",
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-          "dev": true
-        }
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/html-minifier/-/html-minifier-4.0.0.tgz",
+      "integrity": "sha512-aoGxanpFPLg7MkIl/DDFYtb0iWz7jMFGqFhvEDZga6/4QTjneiD8I/NXL1x5aaoCp7FSIT6h/OhykDdPsbtMig==",
+      "dev": true,
+      "requires": {
+        "camel-case": "^3.0.0",
+        "clean-css": "^4.2.1",
+        "commander": "^2.19.0",
+        "he": "^1.2.0",
+        "param-case": "^2.1.1",
+        "relateurl": "^0.2.7",
+        "uglify-js": "^3.5.1"
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@@ -3857,6 +3849,12 @@
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+    "http-link-header": {
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+      "resolved": "https://registry.npmjs.org/http-link-header/-/http-link-header-1.0.3.tgz",
+      "integrity": "sha512-nARK1wSKoBBrtcoESlHBx36c1Ln/gnbNQi1eB6MeTUefJIT3NvUOsV15bClga0k38f0q/kN5xxrGSDS3EFnm9w==",
+      "dev": true
+    },
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       "resolved": "https://registry.npmjs.org/http-signature/-/http-signature-1.2.0.tgz",
@@ -6363,17 +6361,24 @@
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-      "resolved": "https://registry.npmjs.org/sapper/-/sapper-0.25.0.tgz",
-      "integrity": "sha512-qnGPJVYxnGbYnjA4Wu5dHmrr/lsfl/4GfnPTns5O3yOEOcfCPnuTgNtE1juzPzQqG5GUZCyTQ/k5YrpoS1M9fw==",
+      "version": "0.27.16",
+      "resolved": "https://registry.npmjs.org/sapper/-/sapper-0.27.16.tgz",
+      "integrity": "sha512-q8dohkbhga6xO+0a8h84odFyoilQ0D0vJtF8NHra/DQmSeN2R2MXUfwhw3EyvLms3T1x8H3v+qw642Qf5JXA9g==",
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-        "shimport": "0.0.11",
-        "source-map-support": "^0.5.9",
-        "sourcemap-codec": "^1.4.3",
-        "string-hash": "^1.1.3",
-        "tslib": "^1.9.3"
+        "html-minifier": "^4.0.0",
+        "http-link-header": "^1.0.2",
+        "shimport": "^1.0.1",
+        "sourcemap-codec": "^1.4.6",
+        "string-hash": "^1.1.3"
+      },
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+          "resolved": "https://registry.npmjs.org/sourcemap-codec/-/sourcemap-codec-1.4.8.tgz",
+          "integrity": "sha512-9NykojV5Uih4lgo5So5dtw+f0JgJX30KCNI8gwhz2J9A15wD0Ml6tjHKwf6fTSa6fAdVBdZeNOs9eJ71qCk8vA==",
+          "dev": true
+        }
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@@ -6478,9 +6483,9 @@
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-      "resolved": "https://registry.npmjs.org/shimport/-/shimport-0.0.11.tgz",
-      "integrity": "sha512-wRlG/wMuV/czrzJEWBUPjydU/Ve0kTrTH8wHLRjuY6S2BDB+qDDXkTY/WrNc/7t5jnd0LPVO1sRIE7Ga6uXTpw==",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/shimport/-/shimport-1.0.1.tgz",
+      "integrity": "sha512-Imf4gH+8WQmT1GvxS/x79qpmfnE6m50hyN1ucatX+7oMCgmaF8obZWCPIzSUe6+P+YmXM46lkP2pxiV2/lt9Og==",
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@@ -7158,28 +7163,10 @@
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-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.4.10.tgz",
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-      "dev": true,
-      "requires": {
-        "commander": "~2.19.0",
-        "source-map": "~0.6.1"
-      },
-      "dependencies": {
-        "commander": {
-          "version": "2.19.0",
-          "resolved": "https://registry.npmjs.org/commander/-/commander-2.19.0.tgz",
-          "integrity": "sha512-6tvAOO+D6OENvRAh524Dh9jcfKTYDQAqvqezbCW82xj5X0pSrcpxtvRKHLG0yBY6SD7PSDrJaj+0AiOcKVd1Xg==",
-          "dev": true
-        },
-        "source-map": {
-          "version": "0.6.1",
-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
-          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
-          "dev": true
-        }
-      }
+      "version": "3.12.8",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.12.8.tgz",
+      "integrity": "sha512-fvBeuXOsvqjecUtF/l1dwsrrf5y2BCUk9AOJGzGcm6tE7vegku5u/YvqjyDaAGr422PLoLnrxg3EnRvTqsdC1w==",
+      "dev": true
     },
     "unicode-canonical-property-names-ecmascript": {
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diff --git a/package.json b/package.json
index 7765bc3..1272639 100644
--- a/package.json
+++ b/package.json
@@ -66,7 +66,7 @@
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     "rollup-plugin-svelte": "^5.0.3",
     "rollup-plugin-terser": "^4.0.4",
-    "sapper": "^0.25.0",
+    "sapper": "^0.27.11",
     "svelte": "^2.16.1",
     "svelte-preprocess-sass": "^0.1.0",
     "svelte-transitions": "^1.2.0",