diff --git a/yarn.lock b/yarn.lock
index 95be41d..9017464 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -48,6 +48,7 @@ after@0.8.2:
 agent-base@^4.3.0:
   version "4.3.0"
   resolved "https://registry.yarnpkg.com/agent-base/-/agent-base-4.3.0.tgz#8165f01c436009bccad0b1d122f05ed770efc6ee"
+  integrity sha512-salcGninV0nPrwpGNn4VTXBb1SOuXQBiqbrNXoeizJsHrsL6ERFM2Ne3JUSBWRE6aeNJI2ROP/WEEIDUiDe3cg==
   dependencies:
     es6-promisify "^5.0.0"
 
@@ -911,6 +912,7 @@ es6-promise@^4.0.3, es6-promise@^4.2.8:
 es6-promisify@^5.0.0:
   version "5.0.0"
   resolved "https://registry.yarnpkg.com/es6-promisify/-/es6-promisify-5.0.0.tgz#5109d62f3e56ea967c4b63505aef08291c8a5203"
+  integrity sha1-UQnWLz5W6pZ8S2NQWu8IKRyKUgM=
   dependencies:
     es6-promise "^4.0.3"
 
@@ -1493,8 +1495,9 @@ http-proxy@^1.13.0:
     requires-port "^1.0.0"
 
 https-proxy-agent@^2.2.1:
-  version "2.2.2"
-  resolved "https://registry.yarnpkg.com/https-proxy-agent/-/https-proxy-agent-2.2.2.tgz#271ea8e90f836ac9f119daccd39c19ff7dfb0793"
+  version "2.2.4"
+  resolved "https://registry.yarnpkg.com/https-proxy-agent/-/https-proxy-agent-2.2.4.tgz#4ee7a737abd92678a293d9b34a1af4d0d08c787b"
+  integrity sha512-OmvfoQ53WLjtA9HeYP9RNrWMJzzAz1JGaSFr1nijg0PVR1JaD/xbJq1mdEIIlxGpXp9eSe/O2LgU9DJmTPd0Eg==
   dependencies:
     agent-base "^4.3.0"
     debug "^3.1.0"
@@ -2171,6 +2174,7 @@ ms@2.1.1:
 ms@^2.1.1:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.2.tgz#d09d1f357b443f493382a8eb3ccd183872ae6009"
+  integrity sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==
 
 mute-stream@0.0.7:
   version "0.0.7"