diff --git a/lib/config.ts b/lib/config.ts
new file mode 100644
index 00000000..782a635c
--- /dev/null
+++ b/lib/config.ts
@@ -0,0 +1,68 @@
+export const config = {
+  "enableSemanticRules": {
+    "type": "boolean",
+    "title": "Enable semantic rules",
+    "description": "Allow passing a TypeScript program object to the linter. May negatively affect performance. See this page for details: https://palantir.github.io/tslint/usage/type-checking/",
+    "default": false,
+    "order": 1
+  },
+  "rulesDirectory": {
+    "type": "string",
+    "title": "Custom rules directory (absolute path)",
+    "default": "",
+    "order": 2
+  },
+  "fixOnSave": {
+    "title": "Fix errors on save",
+    "description": "Have tslint attempt to fix some errors automatically when saving the file.",
+    "type": "boolean",
+    "default": false,
+    "order": 3
+  },
+  "ignoreTypings": {
+    "type": "boolean",
+    "title": "Ignore typings files (.d.ts)",
+    "default": false,
+    "order": 4
+  },
+  "useLocalTslint": {
+    "type": "boolean",
+    "title": "Try to use the project's local tslint package, if it exists",
+    "default": true,
+    "order": 5
+  },
+  "useGlobalTslint": {
+    "type": "boolean",
+    "title": "Use the global tslint install",
+    "description": "If enabled, the global tslint installation will be used as a fallback, instead of the version packaged with linter-tslint.",
+    "default": false,
+    "order": 6
+  },
+  "globalNodePath": {
+    "type": "string",
+    "title": "Global node installation path",
+    "description": "The location of your global npm install. (Will default to `npm get prefix`.)",
+    "default": "",
+    "order": 7
+  }
+}
+
+export interface ConfigSchema {
+  enableSemanticRules: boolean,
+  rulesDirectory: string | null,
+  fixOnSave: boolean,
+  ignoreTypings: boolean,
+  useLocalTslint: boolean,
+  useGlobalTslint: boolean,
+  globalNodePath: string | null,
+}
+
+export const defaultConfig = {
+  enableSemanticRules: false,
+  rulesDirectory: "",
+  fixOnSave: false,
+  ignoreTypings: false,
+  useLocalTslint: true,
+  useGlobalTslint: false,
+  globalNodePath: "",
+}
diff --git a/lib/main.ts b/lib/main.ts
index 04b9707c..a1835e41 100644
--- a/lib/main.ts
+++ b/lib/main.ts
@@ -3,16 +3,13 @@ import path from 'path';
 import { promises } from 'fs';
 const { stat } = promises;
 import WorkerHelper from './workerHelper';
+export { config } from './config';
+import { defaultConfig } from "./config"
 
 const grammarScopes = ['source.ts', 'source.tsx'];
 const editorClass = 'linter-tslint-compatible-editor';
 const idleCallbacks = new Set();
-const config = {
-  rulesDirectory: null,
-  useLocalTslint: false,
-  useGlobalTslint: false,
-  globalNodePath: null,
-};
+const config = defaultConfig;
 
 // Worker still hasn't initialized, since the queued idle callbacks are
 // done in order, waiting on a newly queued idle callback will ensure that
diff --git a/lib/worker.ts b/lib/worker.ts
index b6794ea7..d5deee3c 100644
--- a/lib/worker.ts
+++ b/lib/worker.ts
@@ -6,12 +6,13 @@ import path from 'path';
 import { getRuleUri } from 'tslint-rule-documentation';
 import ChildProcess from 'child_process';
 import getPath from 'consistent-path';
+import type { ConfigSchema } from "./config"
 
 process.title = 'linter-tslint worker';
 
 const tslintModuleName = 'tslint';
 const tslintCache = new Map();
-const config = {
+const config: ConfigSchema = {
   useLocalTslint: false,
 };
 
@@ -251,7 +252,7 @@ async function lint(content: string, filePath: string, options: object) {
   });
 }
 
-export default async function TsLintWorker(initialConfig: object) {
+export default async function TsLintWorker(initialConfig: ConfigSchema) {
   config.useLocalTslint = initialConfig.useLocalTslint;
   config.enableSemanticRules = initialConfig.enableSemanticRules;
   config.useGlobalTslint = initialConfig.useGlobalTslint;
diff --git a/lib/workerHelper.ts b/lib/workerHelper.ts
index 5781b151..2c476c9c 100644
--- a/lib/workerHelper.ts
+++ b/lib/workerHelper.ts
@@ -1,7 +1,9 @@
 import { Task } from 'atom';
+import type { ConfigSchema } from "./config"
 import cryptoRandomString from 'crypto-random-string';
 
 export default class WorkerHelper {
+  workerInstance: Task
   constructor() {
     this.workerInstance = null;
   }
@@ -10,7 +12,7 @@ export default class WorkerHelper {
     return Boolean(this.workerInstance);
   }
 
-  startWorker(config) {
+  startWorker(config: ConfigSchema) {
     if (!this.workerInstance) {
       this.workerInstance = new Task(require.resolve('./worker.js'));
       this.workerInstance.start(config);
diff --git a/package.json b/package.json
index 8c3c2ef9..313cf095 100644
--- a/package.json
+++ b/package.json
@@ -23,54 +23,6 @@
   "engines": {
     "atom": ">=1.14.0 <2.0.0"
   },
-  "configSchema": {
-    "enableSemanticRules": {
-      "type": "boolean",
-      "title": "Enable semantic rules",
-      "description": "Allow passing a TypeScript program object to the linter. May negatively affect performance. See this page for details: https://palantir.github.io/tslint/usage/type-checking/",
-      "default": false,
-      "order": 1
-    },
-    "rulesDirectory": {
-      "type": "string",
-      "title": "Custom rules directory (absolute path)",
-      "default": "",
-      "order": 2
-    },
-    "fixOnSave": {
-      "title": "Fix errors on save",
-      "description": "Have tslint attempt to fix some errors automatically when saving the file.",
-      "type": "boolean",
-      "default": false,
-      "order": 3
-    },
-    "ignoreTypings": {
-      "type": "boolean",
-      "title": "Ignore typings files (.d.ts)",
-      "default": false,
-      "order": 4
-    },
-    "useLocalTslint": {
-      "type": "boolean",
-      "title": "Try to use the project's local tslint package, if it exists",
-      "default": true,
-      "order": 5
-    },
-    "useGlobalTslint": {
-      "type": "boolean",
-      "title": "Use the global tslint install",
-      "description": "If enabled, the global tslint installation will be used as a fallback, instead of the version packaged with linter-tslint.",
-      "default": false,
-      "order": 6
-    },
-    "globalNodePath": {
-      "type": "string",
-      "title": "Global node installation path",
-      "description": "The location of your global npm install. (Will default to `npm get prefix`.)",
-      "default": "",
-      "order": 7
-    }
-  },
   "dependencies": {
     "atom-package-deps": "7.2.3",
     "consistent-path": "2.0.3",