diff --git a/yarn.lock b/yarn.lock
index 1671540..c4b744e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -72,8 +72,8 @@ are-we-there-yet@~1.1.2:
     readable-stream "^2.0.0 || ^1.1.13"
 
 argparse@^1.0.7:
-  version "1.0.9"
-  resolved "https://registry.yarnpkg.com/argparse/-/argparse-1.0.9.tgz#73d83bc263f86e97f8cc4f6bae1b0e90a7d22c86"
+  version "1.0.10"
+  resolved "https://registry.yarnpkg.com/argparse/-/argparse-1.0.10.tgz#bcd6791ea5ae09725e17e5ad988134cd40b3d911"
   dependencies:
     sprintf-js "~1.0.2"
 
@@ -1438,9 +1438,9 @@ espree@^3.3.1:
     acorn "^4.0.1"
     acorn-jsx "^3.0.0"
 
-esprima@^2.6.0:
-  version "2.7.3"
-  resolved "https://registry.yarnpkg.com/esprima/-/esprima-2.7.3.tgz#96e3b70d5779f6ad49cd032673d1c312767ba581"
+esprima@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.1.tgz#13b04cdb3e6c5d19df91ab6987a8695619b0aa71"
 
 espurify@^1.6.0:
   version "1.6.0"
@@ -1542,7 +1542,7 @@ filled-array@^1.0.0:
 
 find-cache-dir@^0.1.1:
   version "0.1.1"
-  resolved "http://registry.npmjs.org/find-cache-dir/-/find-cache-dir-0.1.1.tgz#c8defae57c8a52a8a784f9e31c57c742e993a0b9"
+  resolved "https://registry.npmjs.org/find-cache-dir/-/find-cache-dir-0.1.1.tgz#c8defae57c8a52a8a784f9e31c57c742e993a0b9"
   dependencies:
     commondir "^1.0.1"
     mkdirp "^0.5.1"
@@ -2075,11 +2075,11 @@ js-tokens@^2.0.0:
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-2.0.0.tgz#79903f5563ee778cc1162e6dcf1a0027c97f9cb5"
 
 js-yaml@^3.4.2, js-yaml@^3.5.1:
-  version "3.7.0"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.7.0.tgz#5c967ddd837a9bfdca5f2de84253abe8a1c03b80"
+  version "3.13.1"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.13.1.tgz#aff151b30bfdfa8e49e05da22e7415e9dfa37847"
   dependencies:
     argparse "^1.0.7"
-    esprima "^2.6.0"
+    esprima "^4.0.0"
 
 jsbn@~0.1.0:
   version "0.1.0"
@@ -2796,7 +2796,7 @@ registry-auth-token@^3.0.1:
 
 registry-url@^3.0.3:
   version "3.1.0"
-  resolved "http://registry.npmjs.org/registry-url/-/registry-url-3.1.0.tgz#3d4ef870f73dde1d77f0cf9a381432444e174942"
+  resolved "https://registry.npmjs.org/registry-url/-/registry-url-3.1.0.tgz#3d4ef870f73dde1d77f0cf9a381432444e174942"
   dependencies:
     rc "^1.0.1"