diff --git a/src/nw/package.json b/src/nw/package.json
index f695d4b..9e09d84 100644
--- a/src/nw/package.json
+++ b/src/nw/package.json
@@ -14,6 +14,6 @@
   "dependencies": {
     "bs58": "^4.0.1",
     "cli-color": "^1.4.0",
-    "js-yaml": "^3.8.4"
+    "js-yaml": "^3.13.1"
   }
 }
diff --git a/src/nw/yarn.lock b/src/nw/yarn.lock
index 0f8d0fd..488495d 100644
--- a/src/nw/yarn.lock
+++ b/src/nw/yarn.lock
@@ -73,9 +73,9 @@ es6-weak-map@^2.0.2:
     es6-iterator "^2.0.1"
     es6-symbol "^3.1.1"
 
-esprima@^3.1.1:
-  version "3.1.3"
-  resolved "https://registry.yarnpkg.com/esprima/-/esprima-3.1.3.tgz#fdca51cee6133895e3c88d535ce49dbff62a4633"
+esprima@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.1.tgz#13b04cdb3e6c5d19df91ab6987a8695619b0aa71"
 
 event-emitter@^0.3.5:
   version "0.3.5"
@@ -88,12 +88,12 @@ is-promise@^2.1:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/is-promise/-/is-promise-2.1.0.tgz#79a2a9ece7f096e80f36d2b2f3bc16c1ff4bf3fa"
 
-js-yaml@^3.8.4:
-  version "3.8.4"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.8.4.tgz#520b4564f86573ba96662af85a8cafa7b4b5a6f6"
+js-yaml@^3.13.1:
+  version "3.13.1"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.13.1.tgz#aff151b30bfdfa8e49e05da22e7415e9dfa37847"
   dependencies:
     argparse "^1.0.7"
-    esprima "^3.1.1"
+    esprima "^4.0.0"
 
 lru-queue@0.1:
   version "0.1.0"
@@ -116,7 +116,7 @@ memoizee@^0.4.14:
 
 next-tick@1:
   version "1.0.0"
-  resolved "http://registry.npmjs.org/next-tick/-/next-tick-1.0.0.tgz#ca86d1fe8828169b0120208e3dc8424b9db8342c"
+  resolved "https://registry.npmjs.org/next-tick/-/next-tick-1.0.0.tgz#ca86d1fe8828169b0120208e3dc8424b9db8342c"
 
 safe-buffer@^5.0.1:
   version "5.1.0"