diff --git a/tron_wif/yarn.lock b/tron_wif/yarn.lock
index 590021ab..f7911b4d 100644
--- a/tron_wif/yarn.lock
+++ b/tron_wif/yarn.lock
@@ -20,12 +20,12 @@ aes-js@3.0.0:
   integrity sha1-4h3xCtbCBTKVvLuNq0Cwnb6ofk0=
 
 axios@^0.18.0:
-  version "0.18.0"
-  resolved "https://registry.yarnpkg.com/axios/-/axios-0.18.0.tgz#32d53e4851efdc0a11993b6cd000789d70c05102"
-  integrity sha1-MtU+SFHv3AoRmTts0AB4nXDAUQI=
+  version "0.18.1"
+  resolved "https://registry.yarnpkg.com/axios/-/axios-0.18.1.tgz#ff3f0de2e7b5d180e757ad98000f1081b87bcea3"
+  integrity sha512-0BfJq4NSfQXd+SkFdrvFbG7addhYSBA2mQwISr46pD6E5iqkWg02RAs8vyTT/j0RTnoYmeXauBuSv1qKwR179g==
   dependencies:
-    follow-redirects "^1.3.0"
-    is-buffer "^1.1.5"
+    follow-redirects "1.5.10"
+    is-buffer "^2.0.2"
 
 babel-runtime@^6.26.0:
   version "6.26.0"
@@ -106,10 +106,10 @@ eventemitter3@^3.1.0:
   resolved "https://registry.yarnpkg.com/eventemitter3/-/eventemitter3-3.1.0.tgz#090b4d6cdbd645ed10bf750d4b5407942d7ba163"
   integrity sha512-ivIvhpq/Y0uSjcHDcOIccjmYjGLcP09MFGE7ysAwkAvkXfpZlC985pH2/ui64DKazbTW/4kN3yqozUxlXzI6cA==
 
-follow-redirects@^1.3.0:
-  version "1.6.1"
-  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.6.1.tgz#514973c44b5757368bad8bddfe52f81f015c94cb"
-  integrity sha512-t2JCjbzxQpWvbhts3l6SH1DKzSrx8a+SsaVf4h6bG4kOXUuPYS/kg2Lr4gQSb7eemaHqJkOThF1BGyjlUkO1GQ==
+follow-redirects@1.5.10:
+  version "1.5.10"
+  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.5.10.tgz#7b7a9f9aea2fdff36786a94ff643ed07f4ff5e2a"
+  integrity sha512-0V5l4Cizzvqt5D44aTXbFZz+FtyXV1vrDN6qrelxtfYQKW0KO0W2T/hkE8xvGa/540LkZlkaUjO4ailYTFtHVQ==
   dependencies:
     debug "=3.1.0"
 
@@ -143,10 +143,10 @@ inherits@^2.0.1, inherits@^2.0.3:
   resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
   integrity sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=
 
-is-buffer@^1.1.5:
-  version "1.1.6"
-  resolved "https://registry.yarnpkg.com/is-buffer/-/is-buffer-1.1.6.tgz#efaa2ea9daa0d7ab2ea13a97b2b8ad51fefbe8be"
-  integrity sha512-NcdALwpXkTm5Zvvbk7owOUSvVvBKDgKP5/ewfXEznmQFfs4ZRmanOeKBTjRVjka3QFoN6XJ+9F3USqfHqTaU5w==
+is-buffer@^2.0.2:
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/is-buffer/-/is-buffer-2.0.5.tgz#ebc252e400d22ff8d77fa09888821a24a658c191"
+  integrity sha512-i2R6zNFDwgEHJyQUtJEk0XFi1i0dPFn/oqjK3/vPCcDeJvW5NQ83V8QbicfF1SupOaB0h8ntgBC2YiE7dfyctQ==
 
 js-sha3@0.5.7:
   version "0.5.7"