diff --git a/package-lock.json b/package-lock.json
index 864282e..4a2950b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -836,9 +836,9 @@
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-      "resolved": "https://registry.npmjs.org/@polka/url/-/url-1.0.0-next.3.tgz",
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+      "resolved": "https://registry.npmjs.org/@polka/url/-/url-1.0.0-next.11.tgz",
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@@ -1130,9 +1130,9 @@
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+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-4.2.3.tgz",
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@@ -2458,11 +2458,11 @@
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-      "version": "1.0.0-next.6",
-      "resolved": "https://registry.npmjs.org/polka/-/polka-1.0.0-next.6.tgz",
-      "integrity": "sha512-e3vZm2cMmPPrgn+0J5DO0rrSTfsCHGyh+YS6jjrqYP8BHJkPq8nCVSDxHkaiEN4f0c2dtR6FB+snDmLE/sRz7A==",
+      "version": "1.0.0-next.11",
+      "resolved": "https://registry.npmjs.org/polka/-/polka-1.0.0-next.11.tgz",
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       "requires": {
-        "@polka/url": "^1.0.0-next.3",
+        "@polka/url": "^1.0.0-next.11",
         "trouter": "^3.1.0"
       }
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@@ -2894,9 +2894,9 @@
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-      "version": "0.27.8",
-      "resolved": "https://registry.npmjs.org/sapper/-/sapper-0.27.8.tgz",
-      "integrity": "sha512-78K+56yu9nGOEU0B0XjBvNchRuPEv4aHbAKK4D874S4aoapMAkHCT0bHtPK12S3P7JPxvvT8GzHaq/8NetMmbg==",
+      "version": "0.27.11",
+      "resolved": "https://registry.npmjs.org/sapper/-/sapper-0.27.11.tgz",
+      "integrity": "sha512-5EaPZhlc8OnyN3UCI6dRSM1Gz5sxyzLZG/1z5nMvZhg9Ng+rSvEvJx/rW/tSHcnQPa8or7+YcbfvQHKS5oPHiw==",
       "dev": true,
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@@ -3282,22 +3282,10 @@
       "dev": true
     },
     "uglify-js": {
-      "version": "3.6.0",
-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.6.0.tgz",
-      "integrity": "sha512-W+jrUHJr3DXKhrsS7NUVxn3zqMOFn0hL/Ei6v0anCIMoKC93TjcflTagwIHLW7SfMFfiQuktQyFVCFHGUE0+yg==",
-      "dev": true,
-      "requires": {
-        "commander": "~2.20.0",
-        "source-map": "~0.6.1"
-      },
-      "dependencies": {
-        "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": "3.10.3",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.10.3.tgz",
+      "integrity": "sha512-Lh00i69Uf6G74mvYpHCI9KVVXLcHW/xu79YTvH7Mkc9zyKUeSPz0owW0dguj0Scavns3ZOh3wY63J0Zb97Za2g==",
+      "dev": true
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     "unicode-canonical-property-names-ecmascript": {
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diff --git a/package.json b/package.json
index c7e8da8..ca9ba2a 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
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     "rollup-plugin-svelte": "^5.0.1",
     "rollup-plugin-terser": "^4.0.4",
-    "sapper": "^0.27.0",
+    "sapper": "^0.27.11",
     "svelte": "^3.0.0",
     "svelte-preprocess": "^2.15.1"
   }