diff --git a/yarn.lock b/yarn.lock
index 97b9421..df6e9f1 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -866,12 +866,6 @@ isstream@~0.1.2:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/isstream/-/isstream-0.1.2.tgz#47e63f7af55afa6f92e1500e690eb8b8529c099a"
 
-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"
-
 jsbn@~0.1.0:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/jsbn/-/jsbn-0.1.1.tgz#a5e654c2e5a2deb5f201d96cefbca80c0ef2f513"
@@ -1427,6 +1421,10 @@ safe-json-parse@4.0.0:
   dependencies:
     rust-result "^1.0.0"
 
+safer-buffer@^2.0.2:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
+
 "semver@2 || 3 || 4 || 5", semver@~5.3.0:
   version "5.3.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.3.0.tgz#9b2ce5d3de02d17c6012ad326aa6b4d0cf54f94f"
@@ -1482,18 +1480,17 @@ spdx-license-ids@^1.0.2:
   resolved "https://registry.yarnpkg.com/spdx-license-ids/-/spdx-license-ids-1.2.2.tgz#c9df7a3424594ade6bd11900d596696dc06bac57"
 
 sshpk@^1.7.0:
-  version "1.11.0"
-  resolved "https://registry.yarnpkg.com/sshpk/-/sshpk-1.11.0.tgz#2d8d5ebb4a6fab28ffba37fa62a90f4a3ea59d77"
+  version "1.18.0"
+  resolved "https://registry.yarnpkg.com/sshpk/-/sshpk-1.18.0.tgz#1663e55cddf4d688b86a46b77f0d5fe363aba028"
   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"
 
 stream-browserify@^2.0.1: