diff --git a/CHANGELOG.md b/CHANGELOG.md
index 15e9d554..ba1c4f73 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 All notable changes to this project will be documented in this file. Dates are displayed in UTC.
 
+#### v5.2.1
+
+- Fix location of `.d.ts` files so that `sources.d.ts` is correctly detected.
+
 #### v5.2.0
 
 - Add `set-methods` polyfills [`#40`](https://github.com/mrhenry/polyfill-library/pull/40) by @mhassan1
diff --git a/types/index.d.ts b/lib/index.d.ts
similarity index 100%
rename from types/index.d.ts
rename to lib/index.d.ts
diff --git a/types/sources.d.ts b/lib/sources.d.ts
similarity index 100%
rename from types/sources.d.ts
rename to lib/sources.d.ts
diff --git a/package-lock.json b/package-lock.json
index 292189f7..00d31f96 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@mrhenry/polyfill-library",
-  "version": "5.2.0",
+  "version": "5.2.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@mrhenry/polyfill-library",
-      "version": "5.2.0",
+      "version": "5.2.1",
       "license": "MIT",
       "workspaces": [
         "polyfills/**/*"
diff --git a/package.json b/package.json
index f17b1cac..46995873 100644
--- a/package.json
+++ b/package.json
@@ -1,9 +1,9 @@
 {
   "name": "@mrhenry/polyfill-library",
-  "version": "5.2.0",
+  "version": "5.2.1",
   "description": "A polyfill combinator",
   "main": "lib/index.js",
-  "types": "types/index.d.ts",
+  "types": "lib/index.d.ts",
   "repository": {
     "type": "git",
     "url": "https://github.com/mrhenry/polyfill-library.git"
@@ -19,7 +19,7 @@
     "lint-config": "node tasks/lint-config/index.js",
     "clean": "node tasks/clean",
     "build": "npm run clean && node tasks/updatesources && node tasks/buildsources/buildsources && npm run build-types",
-    "build-types": "tsc lib/*.js --declaration --allowJs --emitDeclarationOnly --outDir types",
+    "build-types": "tsc lib/*.js --declaration --allowJs --emitDeclarationOnly --outDir lib",
     "watch": "npm run clean && node tasks/updatesources && node tasks/buildsources/watchsource",
     "fmt": "eslint . --fix",
     "test-end-to-end": "node --test 'test/end-to-end/**/*.test.js'",
diff --git a/tasks/clean.js b/tasks/clean.js
index 7aa8a226..00c95069 100644
--- a/tasks/clean.js
+++ b/tasks/clean.js
@@ -9,10 +9,11 @@ const cwd = path.join(__dirname, '../');
 const globOptions = { cwd: cwd };
 
 console.log('Cleaning dist...');
-fs.rmSync('./polyfills/__dist', { recursive: true, force: true });
+fs.rmSync(path.join('polyfills', '__dist'), { recursive: true, force: true });
 
 console.log('Cleaning types...');
-fs.rmSync('./types', { recursive: true, force: true });
+fs.rmSync(path.join('lib', 'index.d.ts'), { recursive: true, force: true });
+fs.rmSync(path.join('lib', 'sources.d.ts'), { recursive: true, force: true });
 
 console.log('Cleaning polyfills...');
 glob('polyfills/**/config.toml', globOptions).then((files) => {