diff --git a/package-lock.json b/package-lock.json
index 90a4730..1dce83f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1958,9 +1958,9 @@
       "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
     },
     "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==",
       "dev": true,
       "requires": {
         "html-minifier": "^4.0.0",
@@ -2188,22 +2188,10 @@
       }
     },
     "uglify-js": {
-      "version": "3.7.7",
-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.7.7.tgz",
-      "integrity": "sha512-FeSU+hi7ULYy6mn8PKio/tXsdSXN35lm4KgV2asx00kzrLU9Pi3oAslcJT70Jdj7PHX29gGUPOT6+lXGBbemhA==",
-      "dev": true,
-      "requires": {
-        "commander": "~2.20.3",
-        "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
     },
     "unicode-canonical-property-names-ecmascript": {
       "version": "1.0.4",
diff --git a/package.json b/package.json
index 2cce921..c67bec8 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
     "rollup-plugin-babel": "^4.0.2",
     "rollup-plugin-svelte": "^5.0.1",
     "rollup-plugin-terser": "^4.0.4",
-    "sapper": "^0.27.0",
+    "sapper": "^0.27.11",
     "svelte": "^3.18.1"
   }
 }