diff --git a/README.md b/README.md
index d792f26..4fb897f 100644
--- a/README.md
+++ b/README.md
@@ -130,6 +130,14 @@ This will check all commits and will fail if your commits do not meet the define
 $ sgc check --start 84a1abd
 ```
 
+### which-config
+
+This command shows which configs gets applied to `sgc`
+
+```sh
+$ sgc which-config
+```
+
 ## Config
 
 > Just create a `.sgcrc` in your project root or you can add everything in your `package.json` with the value `sgc`
diff --git a/__tests__/Config.ts b/__tests__/Config.ts
index 08a7524..e75d09f 100644
--- a/__tests__/Config.ts
+++ b/__tests__/Config.ts
@@ -69,24 +69,37 @@ it('read global config', () => {
   const sgcrc = json.readToObjSync(path.join(fixtures, '.sgcrc'));
 
   fs.writeFileSync(path.join(homedir, '.sgcrc'), JSON.stringify(sgcrc));
-  expect(new Config().config).toEqual(sgcrc);
+
+  const { config } = new Config();
+
   fs.removeSync(path.join(homedir, '.sgcrc'));
+
+  expect(homedir).toBe('test');
+  expect(config).toEqual(sgcrc);
 });
 
 it('read local config from `sgc.config.js`', () => {
   const sgcrc = json.readToObjSync(path.join(fixtures, '.sgcrc'));
 
   fs.writeFileSync(path.join(cwd, 'sgc.config.js'), `module.exports = (${JSON.stringify(sgcrc)})`);
-  expect(new Config().config).toEqual(sgcrc);
+
+  const { config } = new Config();
+
   fs.removeSync(path.join(cwd, 'sgc.config.js'));
+
+  expect(config).toEqual(sgcrc);
 });
 
 it('read global config from `sgc.config.js`', () => {
   const sgcrc = json.readToObjSync(path.join(fixtures, '.sgcrc'));
 
   fs.writeFileSync(path.join(homedir, 'sgc.config.js'), `module.exports = (${JSON.stringify(sgcrc)})`);
-  expect(new Config().config).toEqual(sgcrc);
+
+  const { config } = new Config();
+
   fs.removeSync(path.join(homedir, 'sgc.config.js'));
+
+  expect(config).toEqual(sgcrc);
 });
 
 it('read a .sgcrc_default from a deep nested cwd', () => {
@@ -95,3 +108,21 @@ it('read a .sgcrc_default from a deep nested cwd', () => {
 
   expect(new Config(deepCwd).config).toEqual(fixturesConfig);
 });
+
+it('should get the right config path', () => {
+  const sgcrc = json.readToObjSync(path.join(fixtures, '.sgcrc'));
+
+  fs.writeFileSync(path.join(homedir, 'sgc.config.js'), `module.exports = (${JSON.stringify(sgcrc)})`);
+
+  const { configPath } = new Config();
+
+  fs.removeSync(path.join(homedir, 'sgc.config.js'));
+
+  expect(path.basename(configPath)).toBe('sgc.config.js');
+});
+
+it('should get the right config path', () => {
+  const { configPath } = new Config();
+
+  expect(path.basename(configPath)).toBe('package.json');
+});
diff --git a/lib/Config.ts b/lib/Config.ts
index fcc1a3b..b9329a0 100644
--- a/lib/Config.ts
+++ b/lib/Config.ts
@@ -33,36 +33,43 @@ export interface SgcConfig {
   };
 }
 
-const safeRequire = (jsPath: string | null): SgcConfig | false => (
-  // eslint-disable-next-line global-require, import/no-dynamic-require
-  jsPath && fs.existsSync(jsPath) && require(jsPath)
-);
-
 class Config {
-  altPath: string | null;
+  alternativeCwd: string | null;
 
-  fileName: string;
+  sgcConfigName: string;
 
-  constructor(altPath: string | null = null, fileName = '.sgcrc') {
-    this.altPath = altPath;
-    this.fileName = fileName;
+  constructor(alternativeCwd: string | null = null, sgcConfigName = '.sgcrc') {
+    this.alternativeCwd = alternativeCwd;
+    this.sgcConfigName = sgcConfigName;
 
     this.setConfig();
   }
 
-  private setConfig(): SgcConfig {
-    const pathString = findup(this.fileName, { cwd: this.altPath || cwd });
-    const localeConfigJS = safeRequire(findup('sgc.config.js', { cwd }));
-    const localeConfig = pathString ? json.readToObjSync<SgcConfig>(pathString) : false;
-    const globalConfigJS = safeRequire(path.join(homedir, 'sgc.config.js'));
-    const globalConfig = json.readToObjSync<SgcConfig>(path.join(homedir, '.sgcrc'));
-    const packageJson = findup('package.json', { cwd });
-    const packageConfig = packageJson
-      ? (json.readToObjSync<{ sgc?: SgcConfig }>(packageJson) || {}).sgc
-      : false;
-    const sgcrcDefaultConfig = json.readToObjSync<SgcConfig>(path.join(__dirname, '..', '.sgcrc')) as SgcConfig;
-    const sgcrcTestDefaultConfig = json.readToObjSync<SgcConfig>(path.join(__dirname, '..', '.sgcrc_default')) as SgcConfig;
-    const sgcrcDefault = sgcrcDefaultConfig || sgcrcTestDefaultConfig;
+  static safeRequire = (jsPath: string | null): SgcConfig | false => (
+    // eslint-disable-next-line global-require, import/no-dynamic-require
+    jsPath && require(jsPath)
+  )
+
+  static safeRead = (configPath: string | null): SgcConfig | false => (
+    !!configPath && json.readToObjSync<SgcConfig>(configPath)
+  )
+
+  static getPath = (configPath: string | null): string | null => (
+    !!configPath && fs.existsSync(configPath) ? configPath : null
+  )
+
+  private getConfigPath(): { path: string; defaultPath: string; type: 'rc' | 'js' | 'pkg' } {
+    // paths
+    const localPath = Config.getPath((
+      findup(this.sgcConfigName, { cwd: this.alternativeCwd || cwd })
+    ));
+    const localJsPath = Config.getPath(findup('sgc.config.js', { cwd }));
+    const globalPath = Config.getPath(path.join(homedir, this.sgcConfigName));
+    const globalJsPath = Config.getPath(path.join(homedir, 'sgc.config.js'));
+    const packageJson = Config.getPath(findup('package.json', { cwd }));
+    const defaultPath = Config.getPath(path.join(__dirname, '..', '.sgcrc')) as string;
+    const testDefaultPath = Config.getPath(path.join(__dirname, '..', '.sgcrc_default')) as string;
+    const sgcrcDefault = defaultPath || testDefaultPath;
 
     // priority order (1. highest priority):
     // 1. local config
@@ -73,13 +80,64 @@ class Config {
     // 3. default config
     //   - 1. from ../.sgcrc
     //   - 2. test case ../.sgcrc is renamed to ../.sgcrc_default
-    const config = localeConfigJS
-      || localeConfig
-      || packageConfig
-      || globalConfigJS
-      || globalConfig
+    const configPath = localJsPath
+      || localPath
+      || packageJson
+      || globalJsPath
+      || globalPath
       || sgcrcDefault;
 
+    let type: 'rc' | 'js' | 'pkg';
+
+    switch (path.extname(configPath)) {
+      case '.json':
+        type = 'pkg';
+        break;
+
+      case '.js':
+        type = 'js';
+        break;
+
+      default:
+        type = 'rc';
+        break;
+    }
+
+    return {
+      path: configPath,
+      defaultPath: sgcrcDefault,
+      type,
+    };
+  }
+
+  private setConfig(): SgcConfig {
+    const configPath = this.getConfigPath();
+    const sgcrcDefault: SgcConfig = Config.safeRead(configPath.defaultPath) as SgcConfig;
+
+    let config: SgcConfig = sgcrcDefault;
+    let readConfig: SgcConfig | false;
+
+    switch (configPath.type) {
+      case 'js':
+        readConfig = Config.safeRequire(configPath.path);
+        break;
+
+      case 'pkg':
+        readConfig = (
+          json.readToObjSync<{ sgc: SgcConfig }>(configPath.path)
+          || { sgc: false as false }
+        ).sgc;
+        break;
+
+      default:
+      case 'rc':
+        readConfig = Config.safeRead(configPath.path);
+    }
+
+    if (readConfig) {
+      config = readConfig;
+    }
+
     // set defaults which are necessary
     const modifiedConfig = merge({}, sgcrcDefault, config);
 
@@ -99,6 +157,10 @@ class Config {
   public get config(): SgcConfig {
     return this.setConfig();
   }
+
+  public get configPath(): string {
+    return this.getConfigPath().path;
+  }
 }
 
 export default Config;
diff --git a/lib/index.js b/lib/index.js
index 353ae7f..28c357b 100755
--- a/lib/index.js
+++ b/lib/index.js
@@ -1,11 +1,13 @@
 #!/usr/bin/env node
 
 import updateNotifier from 'update-notifier';
+import chalk from 'chalk';
 import yargs from 'yargs';
 
 import pkg from '../package.json';
 import cli from './cli';
 import check from './check';
+import Config from './Config';
 
 const { argv } = yargs
   .usage('Usage: $0')
@@ -31,6 +33,11 @@ const { argv } = yargs
       },
     },
     check,
+  )
+  .command(
+    'which-config',
+    'Check which config got applied',
+    () => console.log('Following config gets used:\n', chalk.bold(new Config().configPath)),
   );
 
 updateNotifier({ pkg }).notify();
diff --git a/package.json b/package.json
index 3238a1f..2eb8c33 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,6 @@
   ],
   "homepage": "https://github.com/JPeer264/node-semantic-git-commit-cli#readme",
   "devDependencies": {
-    "@types/chalk": "^2.2.0",
     "@types/findup-sync": "^2.0.2",
     "@types/jest": "^25.2.3",
     "@types/lodash.merge": "^4.6.6",
diff --git a/tsconfig.json b/tsconfig.json
index 7151dec..1145aed 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -12,12 +12,13 @@
     "esModuleInterop": true,
     "skipLibCheck": true,
     "outDir": "dest",
-    "rootDir": "lib"
+    "rootDir": "lib",
+    "typeRoots": [
+      "./node_modules/@types",
+      "./typings"
+    ]
   },
   "include": [
     "lib"
-  ],
-  "files": [
-    "./global.d.ts"
   ]
 }
diff --git a/typings/chalk/index.d.ts b/typings/chalk/index.d.ts
new file mode 100644
index 0000000..5adfd6d
--- /dev/null
+++ b/typings/chalk/index.d.ts
@@ -0,0 +1 @@
+declare module 'chalk';
diff --git a/global.d.ts b/typings/git-commit-range/index.d.ts
similarity index 59%
rename from global.d.ts
rename to typings/git-commit-range/index.d.ts
index f766110..ae3aeb8 100644
--- a/global.d.ts
+++ b/typings/git-commit-range/index.d.ts
@@ -1,2 +1 @@
 declare module 'git-commit-range';
-declare module 'chalk';