diff --git a/package-lock.json b/package-lock.json
index 420241d..1edcd14 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2018,9 +2018,9 @@
       }
     },
     "jwt-simple": {
-      "version": "0.5.1",
-      "resolved": "https://registry.npmjs.org/jwt-simple/-/jwt-simple-0.5.1.tgz",
-      "integrity": "sha1-eeoBiRth3mto4T5nwLS1vak3spQ="
+      "version": "0.5.3",
+      "resolved": "https://registry.npmjs.org/jwt-simple/-/jwt-simple-0.5.3.tgz",
+      "integrity": "sha512-mGXp4PTJalEBh5WGe/Ow0P6g+Q4tM/9qAysX7YxCdB/xahDoBKrASZKf7hXT/qTREhOTPJvi4WWpabT2WXh1BQ=="
     },
     "kew": {
       "version": "0.7.0",
@@ -2512,6 +2512,7 @@
           "version": "0.1.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "kind-of": "^3.0.2",
             "longest": "^1.0.1",
@@ -3668,7 +3669,8 @@
         "longest": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "loose-envify": {
           "version": "1.3.1",
diff --git a/package.json b/package.json
old mode 100755
new mode 100644
index eccaf8c..987c83a
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "express": "~4.15.5",
     "express-validator": "^4.2.1",
     "html-pdf": "^2.2.0",
-    "jwt-simple": "^0.5.1",
+    "jwt-simple": "^0.5.3",
     "moment": "^2.19.1",
     "morgan": "~1.9.0",
     "multer": "^1.3.0",