diff --git a/yarn.lock b/yarn.lock
index 9a64137..ad5e0c1 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -168,8 +168,8 @@ acorn-jsx@^5.0.0:
   resolved "https://registry.yarnpkg.com/acorn-jsx/-/acorn-jsx-5.0.1.tgz#32a064fd925429216a09b141102bfdd185fae40e"
 
 acorn@^6.0.2:
-  version "6.0.4"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.0.4.tgz#77377e7353b72ec5104550aa2d2097a2fd40b754"
+  version "6.4.1"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.4.1.tgz#531e58ba3f51b9dacb9a6646ca4debf5b14ca474"
 
 ajv@^6.5.3:
   version "6.5.5"
@@ -892,7 +892,7 @@ chalk@2.3.1:
 
 chalk@^1.1.3:
   version "1.1.3"
-  resolved "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz#a8115c55e4a702fe4d150abd3872822a7e09fc98"
+  resolved "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz#a8115c55e4a702fe4d150abd3872822a7e09fc98"
   dependencies:
     ansi-styles "^2.2.1"
     escape-string-regexp "^1.0.2"
@@ -2202,11 +2202,11 @@ jsbn@~0.1.0:
 
 jsesc@^1.3.0:
   version "1.3.0"
-  resolved "http://registry.npmjs.org/jsesc/-/jsesc-1.3.0.tgz#46c3fec8c1892b12b0833db9bc7622176dbab34b"
+  resolved "https://registry.npmjs.org/jsesc/-/jsesc-1.3.0.tgz#46c3fec8c1892b12b0833db9bc7622176dbab34b"
 
 jsesc@~0.5.0:
   version "0.5.0"
-  resolved "http://registry.npmjs.org/jsesc/-/jsesc-0.5.0.tgz#e7dee66e35d6fc16f710fe91d5cf69f70f08911d"
+  resolved "https://registry.npmjs.org/jsesc/-/jsesc-0.5.0.tgz#e7dee66e35d6fc16f710fe91d5cf69f70f08911d"
 
 json-parse-better-errors@^1.0.1:
   version "1.0.2"
@@ -2230,7 +2230,7 @@ json-stringify-safe@~5.0.1:
 
 json5@^0.5.1:
   version "0.5.1"
-  resolved "http://registry.npmjs.org/json5/-/json5-0.5.1.tgz#1eade7acc012034ad84e2396767ead9fa5495821"
+  resolved "https://registry.npmjs.org/json5/-/json5-0.5.1.tgz#1eade7acc012034ad84e2396767ead9fa5495821"
 
 jsonparse@^1.2.0:
   version "1.3.1"
@@ -2811,7 +2811,7 @@ optionator@^0.8.2:
 
 os-homedir@^1.0.0, os-homedir@^1.0.1, os-homedir@^1.0.2:
   version "1.0.2"
-  resolved "http://registry.npmjs.org/os-homedir/-/os-homedir-1.0.2.tgz#ffbc4988336e0e833de0c168c7ef152121aa7fb3"
+  resolved "https://registry.npmjs.org/os-homedir/-/os-homedir-1.0.2.tgz#ffbc4988336e0e833de0c168c7ef152121aa7fb3"
 
 os-locale@^2.0.0:
   version "2.1.0"
@@ -3163,7 +3163,7 @@ regexpu-core@^2.0.0:
 
 regjsgen@^0.2.0:
   version "0.2.0"
-  resolved "http://registry.npmjs.org/regjsgen/-/regjsgen-0.2.0.tgz#6c016adeac554f75823fe37ac05b92d5a4edb1f7"
+  resolved "https://registry.npmjs.org/regjsgen/-/regjsgen-0.2.0.tgz#6c016adeac554f75823fe37ac05b92d5a4edb1f7"
 
 regjsparser@^0.1.4:
   version "0.1.5"
@@ -3312,7 +3312,7 @@ safe-buffer@^5.0.1, safe-buffer@^5.1.2, safe-buffer@~5.1.0, safe-buffer@~5.1.1:
 
 safe-regex@^1.1.0:
   version "1.1.0"
-  resolved "http://registry.npmjs.org/safe-regex/-/safe-regex-1.1.0.tgz#40a3669f3b077d1e943d44629e157dd48023bf2e"
+  resolved "https://registry.npmjs.org/safe-regex/-/safe-regex-1.1.0.tgz#40a3669f3b077d1e943d44629e157dd48023bf2e"
   dependencies:
     ret "~0.1.10"
 
@@ -3549,7 +3549,7 @@ string_decoder@~1.1.1:
 
 strip-ansi@^3.0.0, strip-ansi@^3.0.1:
   version "3.0.1"
-  resolved "http://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz#6a385fb8853d952d5ff05d0e8aaf94278dc63dcf"
+  resolved "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz#6a385fb8853d952d5ff05d0e8aaf94278dc63dcf"
   dependencies:
     ansi-regex "^2.0.0"