diff --git a/particlecell-web/package-lock.json b/particlecell-web/package-lock.json
index d6699e7..23a8316 100644
--- a/particlecell-web/package-lock.json
+++ b/particlecell-web/package-lock.json
@@ -1241,9 +1241,9 @@
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-      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-4.2.1.tgz",
-      "integrity": "sha512-4ZxI6dy4lrY6FHzfiy1aEOXgu4LIsW2MhwG0VBKdcoGoH/XLFgaHSdLTGr4O8Be6A8r3MOphEiI8Gc1n0ecf3g==",
+      "version": "4.2.3",
+      "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-4.2.3.tgz",
+      "integrity": "sha512-VcMWDN54ZN/DS+g58HYL5/n4Zrqe8vHJpGA8KdgUXFU4fuP/aHNw8eld9SyEIyabIMJX/0RaY/fplOo5hYLSFA==",
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@@ -3319,9 +3319,9 @@
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     "sapper": {
-      "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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@@ -3332,9 +3332,9 @@
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-          "resolved": "https://registry.npmjs.org/sourcemap-codec/-/sourcemap-codec-1.4.6.tgz",
-          "integrity": "sha512-1ZooVLYFxC448piVLBbtOxFcXwnymH9oUF8nRd3CuYDVvkRBxRl6pB4Mtas5a4drtL+E8LDgFkQNcgIw6tc8Hg==",
+          "version": "1.4.8",
+          "resolved": "https://registry.npmjs.org/sourcemap-codec/-/sourcemap-codec-1.4.8.tgz",
+          "integrity": "sha512-9NykojV5Uih4lgo5So5dtw+f0JgJX30KCNI8gwhz2J9A15wD0Ml6tjHKwf6fTSa6fAdVBdZeNOs9eJ71qCk8vA==",
           "dev": true
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@@ -3720,14 +3720,10 @@
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-      "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"
-      }
+      "version": "3.10.3",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.10.3.tgz",
+      "integrity": "sha512-Lh00i69Uf6G74mvYpHCI9KVVXLcHW/xu79YTvH7Mkc9zyKUeSPz0owW0dguj0Scavns3ZOh3wY63J0Zb97Za2g==",
+      "dev": true
     },
     "uid-safe": {
       "version": "2.1.5",
diff --git a/particlecell-web/package.json b/particlecell-web/package.json
index 05fc419..c9ffbb7 100644
--- a/particlecell-web/package.json
+++ b/particlecell-web/package.json
@@ -38,7 +38,7 @@
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     "rollup-plugin-svelte": "^5.1.0",
     "rollup-plugin-terser": "^5.0.0",
-    "sapper": "^0.27.8",
+    "sapper": "^0.27.11",
     "svelte": "^3.12.1",
     "svelte-loader": "^2.13.4"
   },