diff --git a/yarn.lock b/yarn.lock
index 7fddd15..7df0b6b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -111,7 +111,7 @@
 
 "@types/node@*":
   version "9.4.7"
-  resolved "http://registry.npmjs.org/@types/node/-/node-9.4.7.tgz#57d81cd98719df2c9de118f2d5f3b1120dcd7275"
+  resolved "https://registry.npmjs.org/@types/node/-/node-9.4.7.tgz#57d81cd98719df2c9de118f2d5f3b1120dcd7275"
 
 "@types/serve-static@*":
   version "1.13.1"
@@ -1000,8 +1000,8 @@ jws@^3.1.4:
     safe-buffer "^5.0.1"
 
 jwt-simple@^0.5:
-  version "0.5.1"
-  resolved "https://registry.yarnpkg.com/jwt-simple/-/jwt-simple-0.5.1.tgz#79ea01891b61de6b68e13e67c0b4b5bda937b294"
+  version "0.5.6"
+  resolved "https://registry.yarnpkg.com/jwt-simple/-/jwt-simple-0.5.6.tgz#3357adec55b26547114157be66748995b75b333a"
 
 kcors@^2.2.1:
   version "2.2.1"