diff --git a/yarn.lock b/yarn.lock
index ef0c075..3934db2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -747,9 +747,9 @@ acorn-jsx@^5.1.0:
   integrity sha512-tMUqwBWfLFbJbizRmEcWSLw6HnFzfdJs2sOJEOwwtVPMoH/0Ay+E703oZz78VSXZiiDcZrQ5XKjPIUQixhmgVw==
 
 acorn@^7.1.0:
-  version "7.1.0"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-7.1.0.tgz#949d36f2c292535da602283586c2477c57eb2d6c"
-  integrity sha512-kL5CuoXA/dgxlBbVrflsflzQ3PAas7RYZB52NOm/6839iVYJgKMJ3cQJD+t2i5+qFa8h3MDpEOJiS64E8JLnSQ==
+  version "7.1.1"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-7.1.1.tgz#e35668de0b402f359de515c5482a1ab9f89a69bf"
+  integrity sha512-add7dgA5ppRPxCFJoAGfMDi7PIBXq1RtGo7BhbLaxwrXPOmw8gq48Y9ozT01hUKy9byMjlR20EJhu5zlkErEkg==
 
 agent-base@^4.3.0:
   version "4.3.0"
@@ -944,11 +944,6 @@ async@^2.6.1:
   dependencies:
     lodash "^4.17.14"
 
-async@^3.1.1:
-  version "3.1.1"
-  resolved "https://registry.yarnpkg.com/async/-/async-3.1.1.tgz#dd3542db03de837979c9ebbca64ca01b06dc98df"
-  integrity sha512-X5Dj8hK1pJNC2Wzo2Rcp9FBVdJMGRR/S7V+lH46s8GVFhtbo5O4Le5GECCF/8PISVdkUA6mMPvgz7qTTD1rf1g==
-
 asynckit@^0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/asynckit/-/asynckit-0.4.0.tgz#c79ed97f7f34cb8f2ba1bc9790bcc366474b4b79"