diff --git a/yarn.lock b/yarn.lock
index 83babda..f69df2e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -732,8 +732,8 @@ block-stream@*:
     inherits "~2.0.0"
 
 bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.1.1, bn.js@^4.4.0:
-  version "4.11.6"
-  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.6.tgz#53344adb14617a13f6e8dd2ce28905d1c0ba3215"
+  version "4.11.9"
+  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.9.tgz#26d556829458f9d1e81fc48952493d0ba3507828"
 
 body-parser@^1.13.2:
   version "1.15.2"
@@ -806,8 +806,8 @@ braces@^2.3.1, braces@^2.3.2:
     to-regex "^3.0.1"
 
 brorand@^1.0.1:
-  version "1.0.6"
-  resolved "https://registry.yarnpkg.com/brorand/-/brorand-1.0.6.tgz#4028706b915f91f7b349a2e0bf3c376039d216e5"
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/brorand/-/brorand-1.1.0.tgz#12c25efe40a45e3c323eb8675a0a0ce57b22371f"
 
 browser-pack@^5.0.0:
   version "5.0.1"
@@ -1581,13 +1581,16 @@ ee-first@1.1.1:
   resolved "https://registry.yarnpkg.com/ee-first/-/ee-first-1.1.1.tgz#590c61156b0ae2f4f0255732a158b266bc56b21d"
 
 elliptic@^6.0.0:
-  version "6.3.2"
-  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.3.2.tgz#e4c81e0829cf0a65ab70e998b8232723b5c1bc48"
+  version "6.5.3"
+  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.3.tgz#cb59eb2efdaf73a0bd78ccd7015a62ad6e0f93d6"
   dependencies:
     bn.js "^4.4.0"
     brorand "^1.0.1"
     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"
 
 encodeurl@~1.0.1:
   version "1.0.1"
@@ -2272,11 +2275,12 @@ has@^1.0.0:
   dependencies:
     function-bind "^1.0.2"
 
-hash.js@^1.0.0:
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/hash.js/-/hash.js-1.0.3.tgz#1332ff00156c0a0ffdd8236013d07b77a0451573"
+hash.js@^1.0.0, hash.js@^1.0.3:
+  version "1.1.7"
+  resolved "https://registry.yarnpkg.com/hash.js/-/hash.js-1.1.7.tgz#0babca538e8d4ee4a0f8988d68866537a003cf42"
   dependencies:
-    inherits "^2.0.1"
+    inherits "^2.0.3"
+    minimalistic-assert "^1.0.1"
 
 hawk@~3.1.3:
   version "3.1.3"
@@ -2287,6 +2291,14 @@ hawk@~3.1.3:
     hoek "2.x.x"
     sntp "1.x.x"
 
+hmac-drbg@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/hmac-drbg/-/hmac-drbg-1.0.1.tgz#d2745701025a6c775a6c545793ed502fc0c649a1"
+  dependencies:
+    hash.js "^1.0.3"
+    minimalistic-assert "^1.0.0"
+    minimalistic-crypto-utils "^1.0.1"
+
 hoek@2.x.x:
   version "2.16.3"
   resolved "https://registry.yarnpkg.com/hoek/-/hoek-2.16.3.tgz#20bb7403d3cea398e91dc4710a8ff1b8274a25ed"
@@ -2990,9 +3002,13 @@ mime@1.3.4:
   version "1.3.4"
   resolved "https://registry.yarnpkg.com/mime/-/mime-1.3.4.tgz#115f9e3b6b3daf2959983cb38f149a2d40eb5d53"
 
-minimalistic-assert@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/minimalistic-assert/-/minimalistic-assert-1.0.0.tgz#702be2dda6b37f4836bcb3f5db56641b64a1d3d3"
+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:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/minimalistic-crypto-utils/-/minimalistic-crypto-utils-1.0.1.tgz#f6c00c1c0b082246e5c4d99dfb8c7c083b2b582a"
 
 minimatch@0.3:
   version "0.3.0"