diff --git a/package-lock.json b/package-lock.json
index 850dfdc..c4bca01 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -103,6 +103,14 @@
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+    "@types/bn.js": {
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+      "resolved": "https://registry.npmjs.org/@types/bn.js/-/bn.js-4.11.5.tgz",
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+      "requires": {
+        "@types/node": "*"
+      }
+    },
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       "resolved": "https://registry.npmjs.org/@types/node/-/node-10.12.18.tgz",
@@ -1982,9 +1990,9 @@
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+      "version": "5.4.3",
+      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.4.3.tgz",
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@@ -4123,37 +4131,58 @@
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-    "ethereum-common": {
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-      "resolved": "https://registry.npmjs.org/ethereum-common/-/ethereum-common-0.0.18.tgz",
-      "integrity": "sha1-L9w1dvIykDNYl26znaeDIT/5Uj8="
-    },
-    "ethereumjs-abi": {
-      "version": "git+https://github.com/ethereumjs/ethereumjs-abi.git#8431eab7b3384e65e8126a4602520b78031666fb",
-      "from": "git+https://github.com/ethereumjs/ethereumjs-abi.git",
-      "requires": {
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-        "ethereumjs-util": "^6.0.0"
       },
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-          "resolved": "https://registry.npmjs.org/ethereumjs-util/-/ethereumjs-util-6.1.0.tgz",
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+        "ethereumjs-abi": {
+          "version": "git+https://github.com/ethereumjs/ethereumjs-abi.git#8431eab7b3384e65e8126a4602520b78031666fb",
+          "from": "git+https://github.com/ethereumjs/ethereumjs-abi.git",
           "requires": {
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-            "create-hash": "^1.1.2",
-            "ethjs-util": "0.1.6",
-            "keccak": "^1.0.2",
-            "rlp": "^2.0.0",
-            "safe-buffer": "^5.1.1",
-            "secp256k1": "^3.0.1"
+            "bn.js": "^4.11.8",
+            "ethereumjs-util": "^6.0.0"
+          },
+          "dependencies": {
+            "ethereumjs-util": {
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+              "resolved": "https://registry.npmjs.org/ethereumjs-util/-/ethereumjs-util-6.2.0.tgz",
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+                "bn.js": "^4.11.0",
+                "create-hash": "^1.1.2",
+                "ethjs-util": "0.1.6",
+                "keccak": "^2.0.0",
+                "rlp": "^2.2.3",
+                "secp256k1": "^3.0.1"
+              }
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+        },
+        "keccak": {
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+          "resolved": "https://registry.npmjs.org/keccak/-/keccak-2.0.0.tgz",
+          "integrity": "sha512-rKe/lRr0KGhjoz97cwg+oeT1Rj/Y4cjae6glArioUC8JBF9ROGZctwIaaruM7d7naovME4Q8WcQSO908A8qcyQ==",
+          "requires": {
+            "bindings": "^1.2.1",
+            "inherits": "^2.0.3",
+            "nan": "^2.2.1",
+            "safe-buffer": "^5.1.0"
+          }
+        },
+        "rlp": {
+          "version": "2.2.4",
+          "resolved": "https://registry.npmjs.org/rlp/-/rlp-2.2.4.tgz",
+          "integrity": "sha512-fdq2yYCWpAQBhwkZv+Z8o/Z4sPmYm1CUq6P7n6lVTOdb949CnqA0sndXal5C1NleSVSZm6q5F3iEbauyVln/iw==",
+          "requires": {
+            "bn.js": "^4.11.1"
           }
         }
       }
     },
+    "ethereum-common": {
+      "version": "0.0.18",
+      "resolved": "https://registry.npmjs.org/ethereum-common/-/ethereum-common-0.0.18.tgz",
+      "integrity": "sha1-L9w1dvIykDNYl26znaeDIT/5Uj8="
+    },
     "ethereumjs-tx": {
       "version": "1.3.6",
       "resolved": "https://registry.npmjs.org/ethereumjs-tx/-/ethereumjs-tx-1.3.6.tgz",
@@ -4962,7 +4991,8 @@
         },
         "ansi-regex": {
           "version": "2.1.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -4980,11 +5010,13 @@
         },
         "balanced-match": {
           "version": "1.0.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -4997,15 +5029,18 @@
         },
         "code-point-at": {
           "version": "1.1.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -5108,7 +5143,8 @@
         },
         "inherits": {
           "version": "2.0.3",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -5118,6 +5154,7 @@
         "is-fullwidth-code-point": {
           "version": "1.0.0",
           "bundled": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -5130,17 +5167,20 @@
         "minimatch": {
           "version": "3.0.4",
           "bundled": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
         },
         "minimist": {
           "version": "0.0.8",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.2.4",
           "bundled": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.1",
             "yallist": "^3.0.0"
@@ -5157,6 +5197,7 @@
         "mkdirp": {
           "version": "0.5.1",
           "bundled": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -5229,7 +5270,8 @@
         },
         "number-is-nan": {
           "version": "1.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
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           "version": "4.1.1",
@@ -5239,6 +5281,7 @@
         "once": {
           "version": "1.4.0",
           "bundled": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -5314,7 +5357,8 @@
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         "safe-buffer": {
           "version": "5.1.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
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           "version": "2.1.2",
@@ -5344,6 +5388,7 @@
         "string-width": {
           "version": "1.0.2",
           "bundled": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -5361,6 +5406,7 @@
         "strip-ansi": {
           "version": "3.0.1",
           "bundled": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -5399,11 +5445,13 @@
         },
         "wrappy": {
           "version": "1.0.2",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.2",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         }
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@@ -5537,9 +5585,9 @@
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     "google-protobuf": {
-      "version": "3.8.0",
-      "resolved": "https://registry.npmjs.org/google-protobuf/-/google-protobuf-3.8.0.tgz",
-      "integrity": "sha512-tx39PTc//HaIT7K/baUF/8JYLGDozEi1e4xwPP1qSx3InP78cNpbSJpxiDsDMwj77qNOndVBDXnn7oi9zKxZew=="
+      "version": "3.10.0",
+      "resolved": "https://registry.npmjs.org/google-protobuf/-/google-protobuf-3.10.0.tgz",
+      "integrity": "sha512-d0cMO8TJ6xtB/WrVHCv5U81L2ulX+aCD58IljyAN6mHwdHHJ2jbcauX5glvivi3s3hx7EYEo7eUA9WftzamMnw=="
     },
     "got": {
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@@ -11085,14 +11133,14 @@
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     "react-dom": {
-      "version": "16.8.1",
-      "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-16.8.1.tgz",
-      "integrity": "sha512-N74IZUrPt6UiDjXaO7UbDDFXeUXnVhZzeRLy/6iqqN1ipfjrhR60Bp5NuBK+rv3GMdqdIuwIl22u1SYwf330bg==",
+      "version": "16.12.0",
+      "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-16.12.0.tgz",
+      "integrity": "sha512-LMxFfAGrcS3kETtQaCkTKjMiifahaMySFDn71fZUNpPHZQEzmk/GiAeIT8JSOrHB23fnuCOMruL2a8NYlw+8Gw==",
       "requires": {
         "loose-envify": "^1.1.0",
         "object-assign": "^4.1.1",
         "prop-types": "^15.6.2",
-        "scheduler": "^0.13.1"
+        "scheduler": "^0.18.0"
       }
     },
     "react-error-overlay": {
@@ -12186,9 +12234,9 @@
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     "scheduler": {
-      "version": "0.13.1",
-      "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.13.1.tgz",
-      "integrity": "sha512-VJKOkiKIN2/6NOoexuypwSrybx13MY7NSy9RNt8wPvZDMRT1CW6qlpF5jXRToXNHz3uWzbm2elNpZfXfGPqP9A==",
+      "version": "0.18.0",
+      "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.18.0.tgz",
+      "integrity": "sha512-agTSHR1Nbfi6ulI0kYNK0203joW2Y5W4po4l+v03tOoiJKpTBbxpNhWDvqc/4IcOw+KLmSiQLTasZ4cab2/UWQ==",
       "requires": {
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diff --git a/package.json b/package.json
old mode 100755
new mode 100644
index c6126eb..896bc8d
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "react-confirm-alert": "^2.0.5",
     "react-copy-to-clipboard": "^5.0.1",
     "react-dev-utils": ">=5.0.2",
-    "react-dom": ">=16.4.2",
+    "react-dom": ">=16.12.0",
     "react-redux": "^5.0.7",
     "react-router-dom": "^4.2.2",
     "react-scripts": "1.1.4",