diff --git a/.gitignore b/.gitignore
index f5d19e3d..ca2ef914 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,13 +1,10 @@
 /.idea/workspace.xml
 /.idea/tasks.xml
 /node_modules
+/dist
 package-lock.json
 yarn-error.log
 npm-debug.log*
-*.js
-*.d.ts
-*.js.map
-!/types/*.d.ts
 
 # macOS
 .DS_Store
diff --git a/.idea/runConfigurations/test.xml b/.idea/runConfigurations/test.xml
index e9a422df..05f807d5 100644
--- a/.idea/runConfigurations/test.xml
+++ b/.idea/runConfigurations/test.xml
@@ -4,13 +4,6 @@
     <command value="test" />
     <node-interpreter value="project" />
     <envs />
-    <method v="2">
-      <option name="NpmBeforeRunTask" enabled="true">
-        <package-json value="$PROJECT_DIR$/package.json" />
-        <command value="install" />
-        <node-interpreter value="project" />
-        <envs />
-      </option>
-    </method>
+    <method v="2" />
   </configuration>
 </component>
\ No newline at end of file
diff --git a/.npmignore b/.npmignore
index 6fa325c2..2eac4bde 100644
--- a/.npmignore
+++ b/.npmignore
@@ -1,19 +1,3 @@
-/.idea
-/tsconfig.json
-/tsconfig.test.json
-/.eslintignore
-/.github
-/renovate.json
-/.snyk
-*.ts
-!*.d.ts
-
-# yarn and npm
-package-lock.json
-yarn.lock
-yarn-error.log
-npm-debug.log*
-
 # macOS
 .DS_Store
 .AppleDouble
diff --git a/index.test.ts b/index.test.ts
index 7e4ab7d8..6986aab6 100644
--- a/index.test.ts
+++ b/index.test.ts
@@ -15,7 +15,7 @@ import {
     partitionWhile,
     remove,
     removeFirst
-} from "./index";
+} from "./index.js";
 
 test("isArray", t => {
     t.true(isArray([1, 2, 3]));
diff --git a/package.json b/package.json
index e98294a5..8ef059f2 100644
--- a/package.json
+++ b/package.json
@@ -16,16 +16,22 @@
   "scripts": {
     "fix": "eslint . --fix && prettier --write .",
     "lint": "eslint . && prettier --check .",
-    "prepare": "tsc",
+    "prepare": "tsc && tsc --project tsconfig.esm.json",
     "semantic-release": "semantic-release",
     "test": "ava"
   },
+  "type": "module",
   "sideEffects": false,
+  "files": [
+    "dist"
+  ],
+  "main": "./dist/cjs/index.cjs",
+  "module": "./dist/esm/index.js",
   "devDependencies": {
     "@softwareventures/eslint-config": "3.4.2",
     "@softwareventures/prettier-config": "1.0.2",
     "@softwareventures/semantic-release-config": "1.1.1",
-    "@softwareventures/tsconfig": "2.3.3",
+    "@softwareventures/tsconfig": "5.1.0-alpha.1",
     "ava": "3.15.0",
     "cz-conventional-changelog": "3.3.0",
     "eslint": "7.20.0",
@@ -51,11 +57,14 @@
     }
   },
   "ava": {
-    "extensions": [
-      "ts"
-    ],
-    "require": [
-      "ts-node/register"
+    "extensions": {
+      "ts": "module"
+    },
+    "nonSemVerExperiments": {
+      "configurableModuleFormat": true
+    },
+    "nodeArguments": [
+      "--loader=ts-node/esm"
     ]
   },
   "release": {
diff --git a/tsconfig.esm.json b/tsconfig.esm.json
new file mode 100644
index 00000000..4b102be6
--- /dev/null
+++ b/tsconfig.esm.json
@@ -0,0 +1,7 @@
+{
+  "extends": "@softwareventures/tsconfig/esm.json",
+  "exclude": ["**/test.ts", "**/*.test.ts", "dist"],
+  "compilerOptions": {
+    "outDir": "dist/esm"
+  }
+}
diff --git a/tsconfig.json b/tsconfig.json
index 0d63500b..3e6438cf 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,7 +1,7 @@
 {
   "extends": "@softwareventures/tsconfig",
+  "exclude": ["**/test.ts", "**/*.test.ts", "dist"],
   "compilerOptions": {
-    "lib": ["es5", "es2015.core", "es2015.collection"]
-  },
-  "exclude": ["**/test.ts", "**/*.test.ts"]
+    "outDir": "dist/cjs"
+  }
 }
diff --git a/tsconfig.test.json b/tsconfig.test.json
index 19df0346..0e880b79 100644
--- a/tsconfig.test.json
+++ b/tsconfig.test.json
@@ -1,7 +1,7 @@
 {
-  "extends": ".",
+  "extends": "./tsconfig.esm.json",
   "compilerOptions": {
     "noEmit": true
   },
-  "exclude": []
+  "exclude": ["dist"]
 }
diff --git a/yarn.lock b/yarn.lock
index 6d0cbee1..15c6cb14 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -342,10 +342,10 @@
   dependencies:
     tslib "2.0.0"
 
-"@softwareventures/tsconfig@2.3.3":
-  version "2.3.3"
-  resolved "https://registry.yarnpkg.com/@softwareventures/tsconfig/-/tsconfig-2.3.3.tgz#29c619998a6b211180a78f34f0d417eb2eb75b0e"
-  integrity sha512-ymbE2zGMozyPLCDXAIrPU6AIMkQuTrAcdy1BRTkYU0rAE7FfNhyPAP3KHbIy/RzJ49HtIMt/RbPBwCWacSiPdw==
+"@softwareventures/tsconfig@5.1.0-alpha.1":
+  version "5.1.0-alpha.1"
+  resolved "https://registry.yarnpkg.com/@softwareventures/tsconfig/-/tsconfig-5.1.0-alpha.1.tgz#adfce94f0e1c3b6da148ae11123ec1c3e526bc3f"
+  integrity sha512-XLDsvYPUyINmFhykIDiZ6TCz9/Z+Paoto1LplYiZ3mu3UKzHGTo8Md24xkZzfbkW3pBmGWngY45uK5fVHTpDZQ==
 
 "@szmarczak/http-timer@^1.1.2":
   version "1.1.2"
@@ -4753,7 +4753,6 @@ npm@^6.14.9:
     cmd-shim "^3.0.3"
     columnify "~1.5.4"
     config-chain "^1.1.12"
-    debuglog "*"
     detect-indent "~5.0.0"
     detect-newline "^2.1.0"
     dezalgo "~1.0.3"
@@ -4768,7 +4767,6 @@ npm@^6.14.9:
     has-unicode "~2.0.1"
     hosted-git-info "^2.8.8"
     iferr "^1.0.2"
-    imurmurhash "*"
     infer-owner "^1.0.4"
     inflight "~1.0.6"
     inherits "^2.0.4"
@@ -4787,14 +4785,8 @@ npm@^6.14.9:
     libnpx "^10.2.4"
     lock-verify "^2.1.0"
     lockfile "^1.0.4"
-    lodash._baseindexof "*"
     lodash._baseuniq "~4.6.0"
-    lodash._bindcallback "*"
-    lodash._cacheindexof "*"
-    lodash._createcache "*"
-    lodash._getnative "*"
     lodash.clonedeep "~4.5.0"
-    lodash.restparam "*"
     lodash.union "~4.6.0"
     lodash.uniq "~4.5.0"
     lodash.without "~4.4.0"