diff --git a/contracts/DonationBag.sol b/contracts/DonationBag.sol
index 6b9ee2f..ab51e99 100644
--- a/contracts/DonationBag.sol
+++ b/contracts/DonationBag.sol
@@ -1,4 +1,4 @@
-pragma solidity 0.4.21;
+pragma solidity 0.4.23;
 
 
 contract DonationBag {
diff --git a/contracts/TestContract.sol b/contracts/TestContract.sol
index 55537ae..ad305f7 100644
--- a/contracts/TestContract.sol
+++ b/contracts/TestContract.sol
@@ -1,4 +1,4 @@
-pragma solidity 0.4.21;
+pragma solidity 0.4.23;
 
 /**
  * this is a test-contract
diff --git a/package.json b/package.json
index e25a0ad..913450e 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,9 @@
     "dapp",
     "blockchain",
     "ecies",
-    "smart-contract"
+    "smart-contract",
+    "identity",
+    "signature"
   ],
   "main": "./dist/lib/index.js",
   "jsnext:main": "./dist/es/index.js",
@@ -23,7 +25,7 @@
     "test:node": "npm run build && mocha ./test/index.test.js -b --timeout 6000 --exit",
     "test:browser": "npm run build && karma start ./config/karma.conf.js --single-run",
     "lint": "eslint --ignore-path ./config/.eslintignore src test config scripts && solhint \"contracts/**/*.sol\"",
-    "clear": "rimraf -rf ./dist",
+    "clear": "rimraf -rf ./dist && rimraf -rf ./gen",
     "build:sol": "mkdir -p ./gen && node ./scripts/compile-contract.node.js",
     "build:es6": "rimraf -rf dist/es && cross-env NODE_ENV=es6 babel src --out-dir dist/es",
     "build:es5": "cross-env NODE_ENV=es5 node node_modules/babel-cli/bin/babel.js src --out-dir dist/lib",
@@ -43,8 +45,8 @@
     "assert": "1.4.1",
     "async-test-util": "1.5.1",
     "babel-cli": "6.26.0",
-    "babel-core": "6.26.0",
-    "babel-eslint": "8.2.2",
+    "babel-core": "6.26.3",
+    "babel-eslint": "8.2.3",
     "babel-loader": "7.1.4",
     "babel-plugin-transform-async-to-generator": "6.24.1",
     "babel-plugin-transform-class-properties": "6.24.1",
@@ -64,20 +66,20 @@
     "babel-preset-latest": "6.24.1",
     "concurrently": "3.5.1",
     "convert-hrtime": "2.0.0",
-    "cross-env": "5.1.4",
-    "eslint": "4.18.2",
+    "cross-env": "5.1.5",
+    "eslint": "4.19.1",
     "ganache-cli": "6.1.0",
     "js-sha3": "0.7.0",
-    "karma": "2.0.0",
+    "karma": "2.0.2",
     "karma-babel-preprocessor": "7.0.0",
     "karma-browserify": "5.2.0",
     "karma-chrome-launcher": "2.2.0",
-    "karma-coverage": "1.1.1",
+    "karma-coverage": "1.1.2",
     "karma-mocha": "1.3.0",
-    "mocha": "5.0.4",
-    "node": "9.8.0",
+    "mocha": "5.1.1",
+    "node": "10.0.0",
     "rimraf": "2.6.2",
-    "solc": "0.4.21",
+    "solc": "0.4.23",
     "solhint": "1.1.10"
   },
   "dependencies": {
@@ -86,7 +88,7 @@
     "eccrypto": "1.0.3",
     "eth-lib": "0.2.8",
     "ethereumjs-tx": "1.3.4",
-    "ethereumjs-util": "5.1.5",
+    "ethereumjs-util": "5.2.0",
     "secp256k1": "3.5.0",
     "web3": "1.0.0-beta.34"
   }