diff --git a/package-lock.json b/package-lock.json
index 08c2b06..6696b03 100644
--- a/package-lock.json
+++ b/package-lock.json
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-            "eventsource": "0.1.6",
-            "faye-websocket": "~0.11.0",
-            "inherits": "^2.0.1",
+            "debug": "^3.2.5",
+            "eventsource": "^1.0.7",
+            "faye-websocket": "~0.11.1",
+            "inherits": "^2.0.3",
             "json3": "^3.3.2",
-            "url-parse": "^1.1.8"
-          },
-          "dependencies": {
-            "debug": {
-              "version": "2.6.9",
-              "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
-              "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
-              "requires": {
-                "ms": "2.0.0"
-              }
-            }
+            "url-parse": "^1.4.3"
           }
         },
         "string-width": {
@@ -15364,16 +16003,13 @@
           }
         },
         "webpack-dev-middleware": {
-          "version": "3.2.0",
-          "resolved": "https://registry.npmjs.org/webpack-dev-middleware/-/webpack-dev-middleware-3.2.0.tgz",
-          "integrity": "sha512-YJLMF/96TpKXaEQwaLEo+Z4NDK8aV133ROF6xp9pe3gQoS7sxfpXh4Rv9eC+8vCvWfmDjRQaMSlRPbO+9G6jgA==",
+          "version": "3.4.0",
+          "resolved": "https://registry.npmjs.org/webpack-dev-middleware/-/webpack-dev-middleware-3.4.0.tgz",
+          "integrity": "sha512-Q9Iyc0X9dP9bAsYskAVJ/hmIZZQwf/3Sy4xCAZgL5cUkjZmUZLt4l5HpbST/Pdgjn3u6pE7u5OdGd1apgzRujA==",
           "requires": {
-            "loud-rejection": "^1.6.0",
             "memory-fs": "~0.4.1",
             "mime": "^2.3.1",
-            "path-is-absolute": "^1.0.0",
             "range-parser": "^1.0.3",
-            "url-join": "^4.0.0",
             "webpack-log": "^2.0.0"
           }
         },
@@ -15383,15 +16019,15 @@
           "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho="
         },
         "yargs": {
-          "version": "12.0.1",
-          "resolved": "https://registry.npmjs.org/yargs/-/yargs-12.0.1.tgz",
-          "integrity": "sha512-B0vRAp1hRX4jgIOWFtjfNjd9OA9RWYZ6tqGA9/I/IrTMsxmKvtWy+ersM+jzpQqbC3YfLzeABPdeTgcJ9eu1qQ==",
+          "version": "12.0.2",
+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-12.0.2.tgz",
+          "integrity": "sha512-e7SkEx6N6SIZ5c5H22RTZae61qtn3PYUE8JYbBFlK9sYmh3DMQ6E5ygtaG/2BW0JZi4WGgTR2IV5ChqlqrDGVQ==",
           "requires": {
             "cliui": "^4.0.0",
             "decamelize": "^2.0.0",
             "find-up": "^3.0.0",
             "get-caller-file": "^1.0.1",
-            "os-locale": "^2.0.0",
+            "os-locale": "^3.0.0",
             "require-directory": "^2.1.1",
             "require-main-filename": "^1.0.1",
             "set-blocking": "^2.0.0",
diff --git a/package.json b/package.json
index 60b00bf..29dc714 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
     "sw-precache-webpack-plugin": "0.11.5",
     "url-loader": "1.1.1",
     "webpack": "4.17.1",
-    "webpack-dev-server": "3.1.7",
+    "webpack-dev-server": "^3.1.14",
     "webpack-manifest-plugin": "2.0.3",
     "whatwg-fetch": "2.0.3"
   },