diff --git a/yarn.lock b/yarn.lock
index d1f7bd3..8be1604 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -179,10 +179,10 @@ astral-regex@^1.0.0:
   resolved "https://registry.yarnpkg.com/astral-regex/-/astral-regex-1.0.0.tgz#6c8c3fb827dd43ee3918f27b82782ab7658a6fd9"
 
 async@^2.1.4, async@^2.4.0:
-  version "2.6.0"
-  resolved "https://registry.yarnpkg.com/async/-/async-2.6.0.tgz#61a29abb6fcc026fea77e56d1c6ec53a795951f4"
+  version "2.6.4"
+  resolved "https://registry.yarnpkg.com/async/-/async-2.6.4.tgz#706b7ff6084664cd7eae713f6f965433b5504221"
   dependencies:
-    lodash "^4.14.0"
+    lodash "^4.17.14"
 
 asynckit@^0.4.0:
   version "0.4.0"
@@ -2646,7 +2646,7 @@ lodash.templatesettings@^3.0.0:
     lodash._reinterpolate "^3.0.0"
     lodash.escape "^3.0.0"
 
-lodash@4.17.4, lodash@^4.0.0, lodash@^4.14.0, lodash@^4.16.6, lodash@^4.17.4, lodash@^4.2.0, lodash@^4.2.1, lodash@^4.3.0, lodash@^4.6.1:
+lodash@4.17.4:
   version "4.17.4"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
 
@@ -2654,6 +2654,10 @@ lodash@^3.5.0:
   version "3.10.1"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-3.10.1.tgz#5bf45e8e49ba4189e17d482789dfd15bd140b7b6"
 
+lodash@^4.0.0, lodash@^4.16.6, lodash@^4.17.14, lodash@^4.17.4, lodash@^4.2.0, lodash@^4.2.1, lodash@^4.3.0, lodash@^4.6.1:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+
 loose-envify@^1.0.0, loose-envify@^1.1.0, loose-envify@^1.3.1:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/loose-envify/-/loose-envify-1.3.1.tgz#d1a8ad33fa9ce0e713d65fdd0ac8b748d478c848"