diff --git a/package.json b/package.json
index b06ba1cb..58658e4a 100644
--- a/package.json
+++ b/package.json
@@ -107,6 +107,6 @@
     "undate": "0.3.0",
     "webpack": "4.17.2",
     "webpack-cli": "3.1.0",
-    "webpack-dev-server": "3.1.7"
+    "webpack-dev-server": "3.1.8"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index ee49d843..c24c4320 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3621,6 +3621,13 @@ import-local@^1.0.0:
     pkg-dir "^2.0.0"
     resolve-cwd "^2.0.0"
 
+import-local@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/import-local/-/import-local-2.0.0.tgz#55070be38a5993cf18ef6db7e961f5bee5c5a09d"
+  dependencies:
+    pkg-dir "^3.0.0"
+    resolve-cwd "^2.0.0"
+
 imurmurhash@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/imurmurhash/-/imurmurhash-0.1.4.tgz#9218b9b2b928a238b13dc4fb6b6d576f231453ea"
@@ -3706,6 +3713,10 @@ invert-kv@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/invert-kv/-/invert-kv-1.0.0.tgz#104a8e4aaca6d3d8cd157a8ef8bfab2d7a3ffdb6"
 
+invert-kv@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/invert-kv/-/invert-kv-2.0.0.tgz#7393f5afa59ec9ff5f67a27620d11c226e3eec02"
+
 ip-regex@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/ip-regex/-/ip-regex-2.1.0.tgz#fa78bf5d2e6913c911ce9f819ee5146bb6d844e9"
@@ -4300,6 +4311,12 @@ lcid@^1.0.0:
   dependencies:
     invert-kv "^1.0.0"
 
+lcid@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/lcid/-/lcid-2.0.0.tgz#6ef5d2df60e52f82eb228a4c373e8d1f397253cf"
+  dependencies:
+    invert-kv "^2.0.0"
+
 ldap-filter@0.2.2:
   version "0.2.2"
   resolved "https://registry.yarnpkg.com/ldap-filter/-/ldap-filter-0.2.2.tgz#f2b842be0b86da3352798505b31ebcae590d77d0"
@@ -4514,6 +4531,12 @@ mamacro@^0.0.3:
   version "0.0.3"
   resolved "https://registry.yarnpkg.com/mamacro/-/mamacro-0.0.3.tgz#ad2c9576197c9f1abf308d0787865bd975a3f3e4"
 
+map-age-cleaner@^0.1.1:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/map-age-cleaner/-/map-age-cleaner-0.1.2.tgz#098fb15538fd3dbe461f12745b0ca8568d4e3f74"
+  dependencies:
+    p-defer "^1.0.0"
+
 map-cache@^0.2.2:
   version "0.2.2"
   resolved "https://registry.yarnpkg.com/map-cache/-/map-cache-0.2.2.tgz#c32abd0bd6525d9b051645bb4f26ac5dc98a0dbf"
@@ -4589,6 +4612,14 @@ mem@^1.1.0:
   dependencies:
     mimic-fn "^1.0.0"
 
+mem@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/mem/-/mem-4.0.0.tgz#6437690d9471678f6cc83659c00cbafcd6b0cdaf"
+  dependencies:
+    map-age-cleaner "^0.1.1"
+    mimic-fn "^1.0.0"
+    p-is-promise "^1.1.0"
+
 memory-fs@^0.4.0, memory-fs@^0.4.1, memory-fs@~0.4.1:
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/memory-fs/-/memory-fs-0.4.1.tgz#3a9a20b8462523e447cfbc7e8bb80ed667bfc552"
@@ -5254,6 +5285,14 @@ os-locale@^2.0.0:
     lcid "^1.0.0"
     mem "^1.1.0"
 
+os-locale@^3.0.0:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/os-locale/-/os-locale-3.0.1.tgz#3b014fbf01d87f60a1e5348d80fe870dc82c4620"
+  dependencies:
+    execa "^0.10.0"
+    lcid "^2.0.0"
+    mem "^4.0.0"
+
 os-tmpdir@^1.0.0, os-tmpdir@~1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/os-tmpdir/-/os-tmpdir-1.0.2.tgz#bbe67406c79aa85c5cfec766fe5734555dfa1274"
@@ -5269,6 +5308,10 @@ p-cancelable@^0.4.0:
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/p-cancelable/-/p-cancelable-0.4.1.tgz#35f363d67d52081c8d9585e37bcceb7e0bbcb2a0"
 
+p-defer@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/p-defer/-/p-defer-1.0.0.tgz#9f6eb182f6c9aa8cd743004a7d4f96b196b0fb0c"
+
 p-finally@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/p-finally/-/p-finally-1.0.0.tgz#3fbcfb15b899a44123b34b6dcc18b724336a2cae"
@@ -7732,9 +7775,9 @@ webpack-dev-middleware@3.2.0:
     url-join "^4.0.0"
     webpack-log "^2.0.0"
 
-webpack-dev-server@3.1.7:
-  version "3.1.7"
-  resolved "https://registry.yarnpkg.com/webpack-dev-server/-/webpack-dev-server-3.1.7.tgz#cbf8071cc092d9493732aee4f062f0e065994854"
+webpack-dev-server@3.1.8:
+  version "3.1.8"
+  resolved "https://registry.yarnpkg.com/webpack-dev-server/-/webpack-dev-server-3.1.8.tgz#eb7a95945d1108170f902604fb3b939533d9daeb"
   dependencies:
     ansi-html "0.0.7"
     bonjour "^3.5.0"
@@ -7746,7 +7789,7 @@ webpack-dev-server@3.1.7:
     express "^4.16.2"
     html-entities "^1.2.0"
     http-proxy-middleware "~0.18.0"
-    import-local "^1.0.0"
+    import-local "^2.0.0"
     internal-ip "^3.0.1"
     ip "^1.1.5"
     killable "^1.0.0"
@@ -7763,7 +7806,7 @@ webpack-dev-server@3.1.7:
     supports-color "^5.1.0"
     webpack-dev-middleware "3.2.0"
     webpack-log "^2.0.0"
-    yargs "12.0.1"
+    yargs "12.0.2"
 
 webpack-log@^2.0.0:
   version "2.0.0"
@@ -7968,7 +8011,24 @@ yargs@11.1.0, yargs@^11.0.0:
     y18n "^3.2.1"
     yargs-parser "^9.0.2"
 
-yargs@12.0.1, yargs@^12.0.1:
+yargs@12.0.2:
+  version "12.0.2"
+  resolved "https://registry.yarnpkg.com/yargs/-/yargs-12.0.2.tgz#fe58234369392af33ecbef53819171eff0f5aadc"
+  dependencies:
+    cliui "^4.0.0"
+    decamelize "^2.0.0"
+    find-up "^3.0.0"
+    get-caller-file "^1.0.1"
+    os-locale "^3.0.0"
+    require-directory "^2.1.1"
+    require-main-filename "^1.0.1"
+    set-blocking "^2.0.0"
+    string-width "^2.0.0"
+    which-module "^2.0.0"
+    y18n "^3.2.1 || ^4.0.0"
+    yargs-parser "^10.1.0"
+
+yargs@^12.0.1:
   version "12.0.1"
   resolved "https://registry.yarnpkg.com/yargs/-/yargs-12.0.1.tgz#6432e56123bb4e7c3562115401e98374060261c2"
   dependencies: