diff --git a/dist/api.types.js b/dist/api.types.js
index 21ea311..5958ba5 100644
--- a/dist/api.types.js
+++ b/dist/api.types.js
@@ -7,4 +7,4 @@ var ConsoleLogLevel;
     ConsoleLogLevel["info"] = "info";
     ConsoleLogLevel["warn"] = "warn";
     ConsoleLogLevel["error"] = "error";
-})(ConsoleLogLevel || (exports.ConsoleLogLevel = ConsoleLogLevel = {}));
+})(ConsoleLogLevel = exports.ConsoleLogLevel || (exports.ConsoleLogLevel = {}));
diff --git a/dist/esm/api.d.ts b/dist/esm/api.d.ts
new file mode 100644
index 0000000..6c4867f
--- /dev/null
+++ b/dist/esm/api.d.ts
@@ -0,0 +1,18 @@
+import { ConsoleLogLevel } from "./api.types";
+export interface apiConfig {
+    init: (trackID: string, options?: object | null) => void;
+    getSessionURL: (callback?: void) => void;
+    identify: (data?: object) => void;
+    invalidateSession: () => void;
+    newPageView: (options?: object) => void;
+    setOptions: (options?: object) => void;
+    setCustomParams: (data?: object) => void;
+    off: () => void;
+    optOut: () => void;
+    debug: () => void;
+    track: (eventName: string, properties?: object) => void;
+    log: (logLevel: ConsoleLogLevel, ...rest: any) => void;
+}
+declare const api: apiConfig;
+export declare const SDK_VERSION = "1.1.0";
+export default api;
diff --git a/dist/esm/api.js b/dist/esm/api.js
new file mode 100644
index 0000000..374413c
--- /dev/null
+++ b/dist/esm/api.js
@@ -0,0 +1,19 @@
+const apiCall = (name, ...args) => {
+    return window.__ls(name, ...args);
+};
+const api = {
+    init: (trackID, options) => apiCall("init", trackID, options),
+    getSessionURL: (callback) => apiCall("getSessionURL", callback),
+    identify: (data) => apiCall("identify", data),
+    invalidateSession: () => apiCall("invalidateSession"),
+    newPageView: (options) => apiCall("newPageView", options),
+    setOptions: (options) => apiCall("setOptions", options),
+    setCustomParams: (data) => apiCall("setCustomParams", data),
+    off: () => apiCall("off"),
+    optOut: () => apiCall("optOut", true),
+    debug: () => apiCall("debug", true),
+    track: (eventName, properties) => apiCall("track", eventName, properties),
+    log: (logLevel, ...rest) => apiCall("log", logLevel, rest),
+};
+export const SDK_VERSION = "1.1.0";
+export default api;
diff --git a/dist/esm/api.types.d.ts b/dist/esm/api.types.d.ts
new file mode 100644
index 0000000..eb95064
--- /dev/null
+++ b/dist/esm/api.types.d.ts
@@ -0,0 +1,6 @@
+export declare enum ConsoleLogLevel {
+    log = "log",
+    info = "info",
+    warn = "warn",
+    error = "error"
+}
diff --git a/dist/esm/api.types.js b/dist/esm/api.types.js
new file mode 100644
index 0000000..7e13488
--- /dev/null
+++ b/dist/esm/api.types.js
@@ -0,0 +1,7 @@
+export var ConsoleLogLevel;
+(function (ConsoleLogLevel) {
+    ConsoleLogLevel["log"] = "log";
+    ConsoleLogLevel["info"] = "info";
+    ConsoleLogLevel["warn"] = "warn";
+    ConsoleLogLevel["error"] = "error";
+})(ConsoleLogLevel || (ConsoleLogLevel = {}));
diff --git a/dist/esm/index.d.ts b/dist/esm/index.d.ts
new file mode 100644
index 0000000..9d4cf9a
--- /dev/null
+++ b/dist/esm/index.d.ts
@@ -0,0 +1,23 @@
+declare global {
+    interface Window {
+        __ls: any;
+    }
+}
+declare const _default: {
+    init: (trackID: string, options?: object | null | undefined, sdkOptions?: {
+        devMode: boolean;
+        scriptURL: string;
+    }) => void;
+    getSessionURL: (args?: void | undefined) => any;
+    identify: (args?: object | undefined) => any;
+    invalidateSession: (args?: null | undefined) => any;
+    newPageView: (args?: object | undefined) => any;
+    setOptions: (args?: object | undefined) => any;
+    setCustomParams: (args?: object | undefined) => any;
+    off: (args?: null | undefined) => any;
+    optOut: (args?: null | undefined) => any;
+    debug: (args?: null | undefined) => any;
+    track: (eventName: string, properties?: object) => void;
+    log: (logLevel: string, ...args: any) => void;
+};
+export default _default;
diff --git a/dist/esm/index.js b/dist/esm/index.js
new file mode 100644
index 0000000..2b23b28
--- /dev/null
+++ b/dist/esm/index.js
@@ -0,0 +1,69 @@
+import snippet, { defaultScriptURL } from "./snippet";
+import api from "./api";
+const sdkOptionsDefaults = {
+    devMode: false,
+    scriptURL: defaultScriptURL,
+};
+let opts = Object.assign({}, sdkOptionsDefaults);
+const isLoaded = () => window.__ls;
+const getApiMethod = (name) => {
+    if (!isLoaded()) {
+        throw new Error("LiveSession is not loaded. Call init() before calling other API functions");
+    }
+    const objectAPI = api;
+    if (!objectAPI.hasOwnProperty(name)) {
+        throw new Error(`method "${name}" doesn't exist`);
+    }
+    if (opts.devMode) {
+        const msg = `Skipping method: ${name}, devMode enabled`;
+        console.warn(msg);
+        return () => msg;
+    }
+    return objectAPI[name];
+};
+const safeCall = (name) => {
+    return (args) => {
+        const apiMethod = getApiMethod(name);
+        if (apiMethod) {
+            return apiMethod(args);
+        }
+    };
+};
+const safeCallManyArgs = (name) => {
+    return (...args) => {
+        const apiMethod = getApiMethod(name);
+        if (apiMethod) {
+            return apiMethod(...args);
+        }
+    };
+};
+const _init = (trackID, options, sdkOptions = sdkOptionsDefaults) => {
+    opts = Object.assign(Object.assign({}, sdkOptionsDefaults), sdkOptions);
+    if (isLoaded()) {
+        console.warn("LiveSession already inited (skipping init() call)");
+        return;
+    }
+    if (!trackID) {
+        throw new Error(`trackID is required`);
+    }
+    snippet(window, document, "script", sdkOptions.scriptURL);
+    return api.init(trackID, options);
+};
+export default {
+    init: _init,
+    getSessionURL: safeCall("getSessionURL"),
+    identify: safeCall("identify"),
+    invalidateSession: safeCall("invalidateSession"),
+    newPageView: safeCall("newPageView"),
+    setOptions: safeCall("setOptions"),
+    setCustomParams: safeCall("setCustomParams"),
+    off: safeCall("off"),
+    optOut: safeCall("optOut"),
+    debug: safeCall("debug"),
+    track: function (eventName, properties) {
+        safeCallManyArgs("track")(eventName, properties);
+    },
+    log: function (logLevel, ...args) {
+        safeCallManyArgs("log")(logLevel, ...args);
+    },
+};
diff --git a/dist/esm/snippet.d.ts b/dist/esm/snippet.d.ts
new file mode 100644
index 0000000..9829a56
--- /dev/null
+++ b/dist/esm/snippet.d.ts
@@ -0,0 +1,3 @@
+export declare const defaultScriptURL = "https://cdn.livesession.io/track.js";
+declare const snippet: (wnd?: Window & typeof globalThis, doc?: Document, type?: string, scriptURL?: string) => void;
+export default snippet;
diff --git a/dist/esm/snippet.js b/dist/esm/snippet.js
new file mode 100644
index 0000000..a609a62
--- /dev/null
+++ b/dist/esm/snippet.js
@@ -0,0 +1,24 @@
+import { SDK_VERSION } from "./api";
+export const defaultScriptURL = "https://cdn.livesession.io/track.js";
+const snippet = (wnd = window, doc = document, type = "script", scriptURL = defaultScriptURL) => {
+    return ((w, d, t, u) => {
+        if (w.__ls) {
+            throw new Error("LiveSession script already added");
+        }
+        const f = (w.__ls = function () {
+            f.push ? f.push.apply(f, arguments) : f.store.push(arguments);
+        });
+        if (!w.__ls)
+            w.__ls = f;
+        f.store = [];
+        f.v = SDK_VERSION;
+        const ls = d.createElement(t);
+        ls.async = true;
+        ls.src = u;
+        ls.charset = "utf-8";
+        ls.crossOrigin = "anonymous";
+        const h = d.getElementsByTagName("head")[0];
+        h.appendChild(ls);
+    })(wnd, doc, type, scriptURL);
+};
+export default snippet;
diff --git a/dist/index.d.ts b/dist/index.d.ts
index b20ec4d..9d4cf9a 100644
--- a/dist/index.d.ts
+++ b/dist/index.d.ts
@@ -4,7 +4,7 @@ declare global {
     }
 }
 declare const _default: {
-    init: (trackID: string, options?: object | null, sdkOptions?: {
+    init: (trackID: string, options?: object | null | undefined, sdkOptions?: {
         devMode: boolean;
         scriptURL: string;
     }) => void;
diff --git a/package.json b/package.json
index 95d0222..26c3f45 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,8 @@
   "version": "1.2.0",
   "description": "Add a LiveSession script to your site even easier with our SDK",
   "main": "./dist/index.js",
+  "module": "./dist/esm/index.js",
+  "browser": "./dist/esm/index.js",
   "types": "./dist/index.d.ts",
   "repository": {
     "type": "git",
@@ -22,7 +24,7 @@
   "homepage": "https://livesession.io/",
   "scripts": {
     "watch": "tsc -w",
-    "build": "tsc",
+    "build": "tsc && tsc --project tsconfig.esm.json",
     "test": "NODE_ENV=production jest"
   },
   "devDependencies": {
@@ -32,4 +34,4 @@
     "ts-jest": "^26.4.4",
     "typescript": "^4.1.3"
   }
-}
+}
\ No newline at end of file
diff --git a/tsconfig.esm.json b/tsconfig.esm.json
new file mode 100644
index 0000000..741a57c
--- /dev/null
+++ b/tsconfig.esm.json
@@ -0,0 +1,9 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "module": "esnext", 
+    "outDir": "dist/esm", 
+    "declaration": true,
+    "declarationDir": "dist/esm" 
+  }
+}
\ No newline at end of file