diff --git a/yarn.lock b/yarn.lock
index 1249e88..76f57ed 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -142,8 +142,10 @@ asap@~2.0.3:
   resolved "https://registry.yarnpkg.com/asap/-/asap-2.0.5.tgz#522765b50c3510490e52d7dcfe085ef9ba96958f"
 
 asn1@~0.2.3:
-  version "0.2.3"
-  resolved "https://registry.yarnpkg.com/asn1/-/asn1-0.2.3.tgz#dac8787713c9966849fc8180777ebe9c1ddf3b86"
+  version "0.2.4"
+  resolved "https://registry.yarnpkg.com/asn1/-/asn1-0.2.4.tgz#8d2475dfab553bb33e77b54e59e880bb8ce23136"
+  dependencies:
+    safer-buffer "~2.1.0"
 
 assert-plus@1.0.0, assert-plus@^1.0.0:
   version "1.0.0"
@@ -927,8 +929,8 @@ balanced-match@^0.4.1:
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-0.4.2.tgz#cb3f3e3c732dc0f01ee70b403f302e61d7709838"
 
 bcrypt-pbkdf@^1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.1.tgz#63bc5dcb61331b92bc05fd528953c33462a06f8d"
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.2.tgz#a4301d389b6a43f9b67ff3ca11a3f6637e360e9e"
   dependencies:
     tweetnacl "^0.14.3"
 
@@ -1314,10 +1316,11 @@ domutils@1.5.1, domutils@^1.5.1:
     domelementtype "1"
 
 ecc-jsbn@~0.1.1:
-  version "0.1.1"
-  resolved "https://registry.yarnpkg.com/ecc-jsbn/-/ecc-jsbn-0.1.1.tgz#0fc73a9ed5f0d53c38193398523ef7e543777505"
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/ecc-jsbn/-/ecc-jsbn-0.1.2.tgz#3a83a904e54353287874c564b7549386849a98c9"
   dependencies:
     jsbn "~0.1.0"
+    safer-buffer "^2.1.0"
 
 encoding@^0.1.11:
   version "0.1.12"
@@ -1887,7 +1890,7 @@ hawk@~3.1.3:
     hoek "2.x.x"
     sntp "1.x.x"
 
-history@^4.6.1:
+history@4.6.1:
   version "4.6.1"
   resolved "https://registry.yarnpkg.com/history/-/history-4.6.1.tgz#911cf8eb65728555a94f2b12780a0c531a14d2fd"
   dependencies:
@@ -2452,12 +2455,6 @@ jest@^20.0.4:
   dependencies:
     jest-cli "^20.0.4"
 
-jodid25519@^1.0.0:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/jodid25519/-/jodid25519-1.0.2.tgz#06d4912255093419477d425633606e0e90782967"
-  dependencies:
-    jsbn "~0.1.0"
-
 js-tokens@^3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-3.0.1.tgz#08e9f132484a2c45a30907e9dc4d5567b7f114d7"
@@ -2644,7 +2641,7 @@ longest@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/longest/-/longest-1.0.1.tgz#30a0b2da38f73770e8294a0d22e6625ed77d0097"
 
-loose-envify@^1.0.0, loose-envify@^1.1.0, loose-envify@^1.2.0, loose-envify@^1.3.1:
+loose-envify@^1.0.0, loose-envify@^1.2.0, loose-envify@^1.3.1:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/loose-envify/-/loose-envify-1.3.1.tgz#d1a8ad33fa9ce0e713d65fdd0ac8b748d478c848"
   dependencies:
@@ -3068,15 +3065,6 @@ rc@^1.1.7:
     minimist "^1.2.0"
     strip-json-comments "~2.0.1"
 
-react-dom@^15.6.1:
-  version "15.6.1"
-  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-15.6.1.tgz#2cb0ed4191038e53c209eb3a79a23e2a4cf99470"
-  dependencies:
-    fbjs "^0.8.9"
-    loose-envify "^1.1.0"
-    object-assign "^4.1.0"
-    prop-types "^15.5.10"
-
 react-test-renderer@^15.6.1:
   version "15.6.1"
   resolved "https://registry.yarnpkg.com/react-test-renderer/-/react-test-renderer-15.6.1.tgz#026f4a5bb5552661fd2cc4bbcd0d4bc8a35ebf7e"
@@ -3286,6 +3274,10 @@ safe-buffer@^5.0.1:
   version "5.0.1"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.0.1.tgz#d263ca54696cd8a306b5ca6551e92de57918fbe7"
 
+safer-buffer@^2.0.2, safer-buffer@^2.1.0, safer-buffer@~2.1.0:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
+
 sane@~1.6.0:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/sane/-/sane-1.6.0.tgz#9610c452307a135d29c1fdfe2547034180c46775"
@@ -3389,18 +3381,17 @@ sprintf-js@~1.0.2:
   resolved "https://registry.yarnpkg.com/sprintf-js/-/sprintf-js-1.0.3.tgz#04e6926f662895354f3dd015203633b857297e2c"
 
 sshpk@^1.7.0:
-  version "1.13.0"
-  resolved "https://registry.yarnpkg.com/sshpk/-/sshpk-1.13.0.tgz#ff2a3e4fd04497555fed97b39a0fd82fafb3a33c"
+  version "1.16.1"
+  resolved "https://registry.yarnpkg.com/sshpk/-/sshpk-1.16.1.tgz#fb661c0bef29b39db40769ee39fa70093d6f6877"
   dependencies:
     asn1 "~0.2.3"
     assert-plus "^1.0.0"
-    dashdash "^1.12.0"
-    getpass "^0.1.1"
-  optionalDependencies:
     bcrypt-pbkdf "^1.0.0"
+    dashdash "^1.12.0"
     ecc-jsbn "~0.1.1"
-    jodid25519 "^1.0.0"
+    getpass "^0.1.1"
     jsbn "~0.1.0"
+    safer-buffer "^2.0.2"
     tweetnacl "~0.14.0"
 
 string-length@^1.0.1: