diff --git a/karma.conf.js b/karma.conf.js
index 82a17b5f..f166a9e5 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -1,6 +1,7 @@
 module.exports = function(config) {
   config.set({
     frameworks: ['mocha', 'karma-typescript'],
+    exclude: ["src/@types/**"],  // ref: https://github.com/monounity/karma-typescript/issues/254
     files: ['src/**/*.ts', 'test/**/*.ts'],
     preprocessors: {
       '**/*.ts': ['karma-typescript'],
diff --git a/typings/ethjs-util.d.ts b/src/@types/ethjs-util/index.d.ts
similarity index 100%
rename from typings/ethjs-util.d.ts
rename to src/@types/ethjs-util/index.d.ts
diff --git a/src/index.ts b/src/index.ts
index a87fd2ff..37831e28 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,6 +1,3 @@
-/// <reference path="../typings/ethjs-util.d.ts"/>
-import * as ethjsUtil from 'ethjs-util'
-
 /**
  * Constants
  */
diff --git a/tsconfig.json b/tsconfig.json
index 983313f2..e80502d7 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,4 +1,10 @@
 {
   "extends": "@ethereumjs/config-tsc",
-  "include": ["src/**/*.ts", "test/**/*.ts", "typings/**/*.js"]
+  "compilerOptions": {
+    "baseUrl": ".",
+    "paths": {
+      "*": ["src/@types/*"]
+    }
+  },
+  "include": ["src/**/*.ts", "test/**/*.ts"]
 }
diff --git a/tsconfig.prod.json b/tsconfig.prod.json
index 7b74b45d..f93323e1 100644
--- a/tsconfig.prod.json
+++ b/tsconfig.prod.json
@@ -1,7 +1,6 @@
 {
-  "extends": "@ethereumjs/config-tsc",
+  "extends": "./tsconfig.json",
   "compilerOptions": {
     "outDir": "./dist"
-  },
-  "include": ["src/**/*.ts", "typings/**/*.ts"]
+  }
 }