diff --git a/yarn.lock b/yarn.lock
index 2a16500..6cc4c79 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -375,9 +375,9 @@ accepts@~1.3.5:
     mime-types "~2.1.18"
     negotiator "0.6.1"
 
-agent-base@^4.1.0:
-  version "4.2.1"
-  resolved "https://registry.yarnpkg.com/agent-base/-/agent-base-4.2.1.tgz#d89e5999f797875674c07d87f260fc41e83e8ca9"
+agent-base@^4.3.0:
+  version "4.3.0"
+  resolved "https://registry.yarnpkg.com/agent-base/-/agent-base-4.3.0.tgz#8165f01c436009bccad0b1d122f05ed770efc6ee"
   dependencies:
     es6-promisify "^5.0.0"
 
@@ -1646,8 +1646,8 @@ ent@^2.2.0:
   resolved "https://registry.yarnpkg.com/ent/-/ent-2.2.0.tgz#e964219325a21d05f44466a2f686ed6ce5f5dd1d"
 
 es6-promise@^4.0.3:
-  version "4.2.5"
-  resolved "https://registry.yarnpkg.com/es6-promise/-/es6-promise-4.2.5.tgz#da6d0d5692efb461e082c14817fe2427d8f5d054"
+  version "4.2.8"
+  resolved "https://registry.yarnpkg.com/es6-promise/-/es6-promise-4.2.8.tgz#4eb21594c972bc40553d276e510539143db53e0a"
 
 es6-promisify@^5.0.0:
   version "5.0.0"
@@ -2260,10 +2260,10 @@ http-signature@~1.2.0:
     sshpk "^1.7.0"
 
 https-proxy-agent@^2.2.1:
-  version "2.2.1"
-  resolved "https://registry.yarnpkg.com/https-proxy-agent/-/https-proxy-agent-2.2.1.tgz#51552970fa04d723e04c56d04178c3f92592bbc0"
+  version "2.2.4"
+  resolved "https://registry.yarnpkg.com/https-proxy-agent/-/https-proxy-agent-2.2.4.tgz#4ee7a737abd92678a293d9b34a1af4d0d08c787b"
   dependencies:
-    agent-base "^4.1.0"
+    agent-base "^4.3.0"
     debug "^3.1.0"
 
 iconv-lite@0.4.23:
@@ -2963,10 +2963,14 @@ ms@2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
 
-ms@^2.0.0, ms@^2.1.1:
+ms@^2.0.0:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.1.tgz#30a5864eb3ebb0a66f2ebe6d727af06a09d86e0a"
 
+ms@^2.1.1:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.2.tgz#d09d1f357b443f493382a8eb3ccd183872ae6009"
+
 nan@^2.0.0, nan@^2.9.2:
   version "2.12.1"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.12.1.tgz#7b1aa193e9aa86057e3c7bbd0ac448e770925552"