diff --git a/blockchain/package-lock.json b/blockchain/package-lock.json
index 74d1511..576a1e3 100644
--- a/blockchain/package-lock.json
+++ b/blockchain/package-lock.json
@@ -428,7 +428,7 @@
     },
     "babel-core": {
       "version": "6.17.0",
-      "resolved": "http://registry.npmjs.org/babel-core/-/babel-core-6.17.0.tgz",
+      "resolved": "https://registry.npmjs.org/babel-core/-/babel-core-6.17.0.tgz",
       "integrity": "sha1-bEV2RH30eeJB5YyAfkvH2k239CU=",
       "dev": true,
       "requires": {
@@ -1521,7 +1521,7 @@
     },
     "browserslist": {
       "version": "1.4.0",
-      "resolved": "http://registry.npmjs.org/browserslist/-/browserslist-1.4.0.tgz",
+      "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-1.4.0.tgz",
       "integrity": "sha1-nP3PU4TZFY9bcNoqoAsw6P8BkEk=",
       "dev": true,
       "requires": {
@@ -1693,7 +1693,7 @@
     },
     "chalk": {
       "version": "1.1.3",
-      "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
       "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
       "dev": true,
       "requires": {
@@ -1934,7 +1934,7 @@
     },
     "commander": {
       "version": "2.8.1",
-      "resolved": "http://registry.npmjs.org/commander/-/commander-2.8.1.tgz",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-2.8.1.tgz",
       "integrity": "sha1-Br42f+v9oMMwqh4qBy09yXYkJdQ=",
       "dev": true,
       "requires": {
@@ -3571,7 +3571,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -3592,12 +3593,14 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -3612,17 +3615,20 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -3739,7 +3745,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -3751,6 +3758,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -3765,6 +3773,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -3772,12 +3781,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.2.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.1",
             "yallist": "^3.0.0"
@@ -3796,6 +3807,7 @@
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -3876,7 +3888,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -3888,6 +3901,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -3973,7 +3987,8 @@
         "safe-buffer": {
           "version": "5.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -4009,6 +4024,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -4028,6 +4044,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -4071,12 +4088,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -4362,9 +4381,9 @@
       }
     },
     "hosted-git-info": {
-      "version": "2.7.1",
-      "resolved": "https://registry.npmjs.org/hosted-git-info/-/hosted-git-info-2.7.1.tgz",
-      "integrity": "sha512-7T/BxH19zbcCTa8XkMlbK5lTo1WtgkFi3GvdWEyNuc4Vex7/9Dqbnpsf4JMydcfj9HCg4zUWFTL3Za6lapg5/w==",
+      "version": "2.8.9",
+      "resolved": "https://registry.npmjs.org/hosted-git-info/-/hosted-git-info-2.8.9.tgz",
+      "integrity": "sha512-mxIDAb9Lsm6DoOJ7xH+5+X4y1LU/4Hi50L9C5sIswK3JzULS4bwk1FvjdBgvYR4bzT4tuUQiC15FE2f5HbLvYw==",
       "dev": true
     },
     "html-comment-regex": {
@@ -9005,7 +9024,7 @@
     },
     "web3": {
       "version": "0.16.0",
-      "resolved": "http://registry.npmjs.org/web3/-/web3-0.16.0.tgz",
+      "resolved": "https://registry.npmjs.org/web3/-/web3-0.16.0.tgz",
       "integrity": "sha1-pFVBdc1GKUMDWx8dOUMvdBxrYBk=",
       "dev": true,
       "requires": {
@@ -9097,7 +9116,7 @@
         },
         "uglify-js": {
           "version": "2.7.5",
-          "resolved": "http://registry.npmjs.org/uglify-js/-/uglify-js-2.7.5.tgz",
+          "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-2.7.5.tgz",
           "integrity": "sha1-RhLAx7qu4rp8SH3kkErhIgefLKg=",
           "dev": true,
           "requires": {