diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 16f9e207..28623ee0 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -17,6 +17,8 @@ For details on contributing to documentation, see [Website Directory Readme](htt
 git clone https://github.com/StaticJsCMS/static-cms
 cd static-cms
 yarn
+cd core
+yarn
 ```
 
 ### Run core locally
@@ -24,6 +26,7 @@ yarn
 > In `core` directory
 
 ```sh
+cd core # if not there already
 yarn start
 ```
 
@@ -34,6 +37,7 @@ yarn start
 Starts the development server. This task runs both the `clean` and `develop` scripts.
 
 ```sh
+cd core # if not there already
 yarn start
 ```
 
@@ -42,6 +46,7 @@ yarn start
 Removes the `dist` directory.
 
 ```sh
+cd core # if not there already
 yarn clean
 ```
 
@@ -50,6 +55,7 @@ yarn clean
 Runs the `clean` script and builds the @static-cms/core.
 
 ```sh
+cd core # if not there already
 yarn build
 ```
 
@@ -58,6 +64,7 @@ yarn build
 Formats code and docs according to our style guidelines.
 
 ```sh
+cd core # if not there already
 yarn format
 ```
 
diff --git a/core/tsconfig.base.json b/core/tsconfig.base.json
index 7e6216d5..60ee1f5f 100644
--- a/core/tsconfig.base.json
+++ b/core/tsconfig.base.json
@@ -1,5 +1,6 @@
 {
   "compilerOptions": {
+    "sourceMap": true,
     "declaration": true,
     "declarationDir": "dist",
     "emitDeclarationOnly": true,
diff --git a/core/webpack.config.js b/core/webpack.config.js
index 2f451958..0f2049ab 100644
--- a/core/webpack.config.js
+++ b/core/webpack.config.js
@@ -13,6 +13,7 @@ function moduleNameToPath(libName) {
 module.exports = {
   entry: './src/index.ts',
   mode: isProduction ? 'production' : 'development',
+  devtool: 'source-map',
   module: {
     rules: [
       {