diff --git a/package-lock.json b/package-lock.json
index 082e15f..9547b75 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1027,9 +1027,9 @@
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+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-4.2.3.tgz",
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@@ -1826,9 +1826,9 @@
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     "sapper": {
-      "version": "0.27.9",
-      "resolved": "https://registry.npmjs.org/sapper/-/sapper-0.27.9.tgz",
-      "integrity": "sha512-v3b3UgGeVhFUOpA5IZgdThdr4nZ6aMH6IxDsg1Yu2UWHWEV9vW/Zehch9M/xqJNp/x9n9X+S9syJg1s5QOOmFA==",
+      "version": "0.27.11",
+      "resolved": "https://registry.npmjs.org/sapper/-/sapper-0.27.11.tgz",
+      "integrity": "sha512-5EaPZhlc8OnyN3UCI6dRSM1Gz5sxyzLZG/1z5nMvZhg9Ng+rSvEvJx/rW/tSHcnQPa8or7+YcbfvQHKS5oPHiw==",
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@@ -2046,22 +2046,10 @@
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-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.7.3.tgz",
-      "integrity": "sha512-7tINm46/3puUA4hCkKYo4Xdts+JDaVC9ZPRcG8Xw9R4nhO/gZgUM3TENq8IF4Vatk8qCig4MzP/c8G4u2BkVQg==",
-      "dev": true,
-      "requires": {
-        "commander": "~2.20.3",
-        "source-map": "~0.6.1"
-      },
-      "dependencies": {
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-          "version": "0.6.1",
-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
-          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
-          "dev": true
-        }
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+      "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 65df778..04b828c 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
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     "npm-run-all": "^4.1.5",
-    "sapper": "^0.27.0",
+    "sapper": "^0.27.11",
     "svelte": "^3.0.0",
     "@babel/core": "^7.0.0",
     "@babel/plugin-syntax-dynamic-import": "^7.0.0",