diff --git a/yarn.lock b/yarn.lock
index 2eb95dd..5726acd 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2959,7 +2959,7 @@ bluebird@^3.5.5:
   version "3.7.2"
   resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.7.2.tgz#9f229c15be272454ffa973ace0dbee79a1b0c36f"
 
-bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.11.8, bn.js@^4.11.9, bn.js@^4.4.0:
+bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.11.8, bn.js@^4.11.9:
   version "4.11.9"
   resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.9.tgz#26d556829458f9d1e81fc48952493d0ba3507828"
 
@@ -3030,9 +3030,10 @@ braces@~3.0.2:
   dependencies:
     fill-range "^7.0.1"
 
-brorand@^1.0.1:
+brorand@^1.0.1, brorand@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/brorand/-/brorand-1.1.0.tgz#12c25efe40a45e3c323eb8675a0a0ce57b22371f"
+  integrity sha512-cKV8tMCEpQs4hK/ik71d6LrPOnpkpGBR0wzxqr68g2m/LB2GxVYQroAjMJZRVM1Y4BCjCKc3vAamxSzOY2RP+w==
 
 browser-process-hrtime@^1.0.0:
   version "1.0.0"
@@ -4349,16 +4350,17 @@ electron-to-chromium@^1.3.378, electron-to-chromium@^1.3.571:
   resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.581.tgz#7f796fe92cdc18f5013769dc6f45f4536315a183"
 
 elliptic@^6.4.0, elliptic@^6.4.1, elliptic@^6.5.1, elliptic@^6.5.2, elliptic@^6.5.3:
-  version "6.5.3"
-  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.3.tgz#cb59eb2efdaf73a0bd78ccd7015a62ad6e0f93d6"
+  version "6.6.1"
+  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.6.1.tgz#3b8ffb02670bf69e382c7f65bf524c97c5405c06"
+  integrity sha512-RaddvvMatK2LJHqFJ+YA4WysVN5Ita9E35botqIYspQ4TkRAlCicdzKOjlyv/1Za5RyTNn7di//eEV0uTAfe3g==
   dependencies:
-    bn.js "^4.4.0"
-    brorand "^1.0.1"
+    bn.js "^4.11.9"
+    brorand "^1.1.0"
     hash.js "^1.0.0"
-    hmac-drbg "^1.0.0"
-    inherits "^2.0.1"
-    minimalistic-assert "^1.0.0"
-    minimalistic-crypto-utils "^1.0.0"
+    hmac-drbg "^1.0.1"
+    inherits "^2.0.4"
+    minimalistic-assert "^1.0.1"
+    minimalistic-crypto-utils "^1.0.1"
 
 emoji-regex@^7.0.1, emoji-regex@^7.0.2:
   version "7.0.3"
@@ -5598,9 +5600,10 @@ history@^4.9.0:
     tiny-warning "^1.0.0"
     value-equal "^1.0.1"
 
-hmac-drbg@^1.0.0:
+hmac-drbg@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/hmac-drbg/-/hmac-drbg-1.0.1.tgz#d2745701025a6c775a6c545793ed502fc0c649a1"
+  integrity sha512-Tti3gMqLdZfhOQY1Mzf/AanLiqh1WTiJgEj26ZuYQ9fbkLomzGchCws4FyrSd4VkpBfiNhaE1On+lOz894jvXg==
   dependencies:
     hash.js "^1.0.3"
     minimalistic-assert "^1.0.0"
@@ -7214,7 +7217,7 @@ minimalistic-assert@^1.0.0, minimalistic-assert@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/minimalistic-assert/-/minimalistic-assert-1.0.1.tgz#2e194de044626d4a10e7f7fbc00ce73e83e4d5c7"
 
-minimalistic-crypto-utils@^1.0.0, minimalistic-crypto-utils@^1.0.1:
+minimalistic-crypto-utils@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/minimalistic-crypto-utils/-/minimalistic-crypto-utils-1.0.1.tgz#f6c00c1c0b082246e5c4d99dfb8c7c083b2b582a"
 
@@ -8840,10 +8843,6 @@ raw-body@2.4.0:
     iconv-lite "0.4.24"
     unpipe "1.0.0"
 
-react-addons-test-utils@^15.6.2:
-  version "15.6.2"
-  resolved "https://registry.yarnpkg.com/react-addons-test-utils/-/react-addons-test-utils-15.6.2.tgz#c12b6efdc2247c10da7b8770d185080a7b047156"
-
 react-app-polyfill@^1.0.6:
   version "1.0.6"
   resolved "https://registry.yarnpkg.com/react-app-polyfill/-/react-app-polyfill-1.0.6.tgz#890f8d7f2842ce6073f030b117de9130a5f385f0"