diff --git a/package-lock.json b/package-lock.json
index b23cdae..046868a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3166,9 +3166,9 @@
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@@ -4639,7 +4630,8 @@
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@@ -4785,7 +4782,8 @@
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@@ -4795,6 +4793,7 @@
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@@ -4807,17 +4806,20 @@
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@@ -4834,6 +4836,7 @@
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@@ -4906,7 +4909,8 @@
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@@ -4991,7 +4996,8 @@
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@@ -5038,6 +5045,7 @@
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@@ -5076,11 +5084,13 @@
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-      "integrity": "sha1-K01OlbpEDZFf8IvImeRVNmZxMxY=",
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@@ -9817,7 +9825,7 @@
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-          "integrity": "sha1-Wf3g9DW62suhA6hOnTvGTpa5k30=",
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@@ -12920,7 +12913,6 @@
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@@ -13116,6 +13108,22 @@
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+      "resolved": "https://registry.npmjs.org/uglify-es/-/uglify-es-3.3.9.tgz",
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+      "requires": {
+        "commander": "~2.13.0",
+        "source-map": "~0.6.1"
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+      "dependencies": {
+        "commander": {
+          "version": "2.13.0",
+          "resolved": "https://registry.npmjs.org/commander/-/commander-2.13.0.tgz",
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@@ -13341,9 +13349,9 @@
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+      "version": "1.19.2",
+      "resolved": "https://registry.npmjs.org/urijs/-/urijs-1.19.2.tgz",
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@@ -13571,7 +13579,6 @@
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       "requires": {
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@@ -13611,10 +13618,6 @@
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diff --git a/package.json b/package.json
index b17aa71..57d7379 100644
--- a/package.json
+++ b/package.json
@@ -96,7 +96,7 @@
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     "style-loader": "0.23.0",
-    "sw-precache-webpack-plugin": "0.11.5",
+    "sw-precache-webpack-plugin": "1.0.0",
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     "truffle-contract": "^3.0.5",
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