diff --git a/yarn.lock b/yarn.lock
index f62b82d..0189cbc 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1217,8 +1217,8 @@ acorn-dynamic-import@^3.0.0:
     acorn "^5.0.0"
 
 acorn@^5.0.0, acorn@^5.6.2:
-  version "5.7.2"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.2.tgz#91fa871883485d06708800318404e72bfb26dcc5"
+  version "5.7.4"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.4.tgz#3e8d8a9947d0599a1796d10225d7432f4a4acf5e"
 
 agent-base@4, agent-base@^4.1.0, agent-base@~4.2.0:
   version "4.2.1"
@@ -3801,7 +3801,7 @@ mixin-deep@^1.2.0:
 
 "mkdirp@>=0.5 0", mkdirp@^0.5.0, mkdirp@^0.5.1, mkdirp@~0.5.0:
   version "0.5.1"
-  resolved "http://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
+  resolved "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
   dependencies:
     minimist "0.0.8"