diff --git a/package.json b/package.json
index 8805df8..ae5b166 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "file-loader": "0.11.2",
     "html-webpack-plugin": "2.29.0",
     "node-sass": "4.5.3",
-    "offline-plugin": "4.8.3",
+    "offline-plugin": "4.9.1",
     "sass-loader": "6.0.6",
     "style-loader": "0.18.2",
     "webpack": "3.4.1",
diff --git a/yarn.lock b/yarn.lock
index e5fcf25..7dbc2d7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3464,9 +3464,9 @@ obuf@^1.0.0, obuf@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/obuf/-/obuf-1.1.1.tgz#104124b6c602c6796881a042541d36db43a5264e"
 
-offline-plugin@4.8.3:
-  version "4.8.3"
-  resolved "https://registry.yarnpkg.com/offline-plugin/-/offline-plugin-4.8.3.tgz#9e95bd342ea2ac836b001b81f204c40638694d6c"
+offline-plugin@4.9.1:
+  version "4.9.1"
+  resolved "https://registry.yarnpkg.com/offline-plugin/-/offline-plugin-4.9.1.tgz#e97a6be3118b4dc360e06ed4bc473f10f2de73b6"
   dependencies:
     deep-extend "^0.4.0"
     ejs "^2.3.4"