diff --git a/yarn.lock b/yarn.lock
index 5dd20f5..3556f91 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -186,10 +186,10 @@ async-validator@~1.8.1:
     babel-runtime "6.x"
 
 async@^2.1.2, async@^2.1.5:
-  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"
@@ -2852,9 +2852,9 @@ lodash.uniq@^4.5.0:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/lodash.uniq/-/lodash.uniq-4.5.0.tgz#d0225373aeb652adc1bc82e4945339a842754773"
 
-lodash@^4.0.0, lodash@^4.14.0, lodash@^4.17.2, lodash@^4.17.3, lodash@^4.17.4, lodash@^4.3.0, lodash@~4.17.4:
-  version "4.17.4"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
+lodash@^4.0.0, lodash@^4.17.14, lodash@^4.17.2, lodash@^4.17.3, lodash@^4.17.4, lodash@^4.3.0, lodash@~4.17.4:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
 
 log-symbols@^2.1.0:
   version "2.2.0"