diff --git a/demo/index.html b/demo/index.html
index cc556ac..7b6906b 100644
--- a/demo/index.html
+++ b/demo/index.html
@@ -128,7 +128,7 @@ <h1>StreamBIM widget demo</h1>
       }
 
 
-      StreamBIM.connectToParent(window, {
+      StreamBIM.connectToParent(window.parent, {
         pickedObject: function (result) {
           logEvent('Clicked object "' + result.guid + '" at (' + result.point[0].toFixed(2) + ', ' + result.point[1].toFixed(2) + ', ' + result.point[2].toFixed(2) + ')');
           document.getElementById('guidInput').value = result.guid;
diff --git a/dist/streambim-widget-api.min.js b/dist/streambim-widget-api.min.js
index 5b00811..d14e7d6 100644
--- a/dist/streambim-widget-api.min.js
+++ b/dist/streambim-widget-api.min.js
@@ -1 +1 @@
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\ No newline at end of file
+(()=>{"use strict";var e={691:(e,t,s)=>{var n,r,o,a=class extends Error{code;constructor(e,t){super(t),this.name="PenpalError",this.code=e}},i=e=>({name:e.name,message:e.message,stack:e.stack,penpalCode:e instanceof a?e.code:void 0}),d=Symbol("Reply"),l=class{value;transferables;#e=d;constructor(e,t){this.value=e,this.transferables=t?.transferables}},c="penpal",h=e=>"object"==typeof e&&null!==e,m=e=>"function"==typeof e,g=e=>"SYN"===e.type,p=e=>"ACK1"===e.type,u=e=>"ACK2"===e.type,f=e=>"CALL"===e.type,w=e=>"REPLY"===e.type,v=(e,t=[])=>{const s=[];for(const n of Object.keys(e)){const r=e[n];m(r)?s.push([...t,n]):h(r)&&s.push(...v(r,[...t,n]))}return s},y=e=>e.join("."),M=(e,t,s)=>({namespace:c,channel:e,type:"REPLY",callId:t,isError:!0,...s instanceof Error?{value:i(s),isSerializedErrorInstance:!0}:{value:s}}),E=(e,t,s,n)=>{let r=!1;const o=async o=>{if(r)return;if(!f(o))return;n?.(`Received ${y(o.methodPath)}() call`,o);const{methodPath:i,args:d,id:g}=o;let p,u;try{const e=((e,t)=>{const s=e.reduce(((e,t)=>h(e)?e[t]:void 0),t);return m(s)?s:void 0})(i,t);if(!e)throw new a("METHOD_NOT_FOUND",`Method \`${y(i)}\` is not found.`);let n=await e(...d);n instanceof l&&(u=n.transferables,n=await n.value),p={namespace:c,channel:s,type:"REPLY",callId:g,value:n}}catch(e){p=M(s,g,e)}if(!r)try{n?.(`Sending ${y(i)}() reply`,p),e.sendMessage(p,u)}catch(t){throw"DataCloneError"===t.name&&(p=M(s,g,t),n?.(`Sending ${y(i)}() reply`,p),e.sendMessage(p)),t}};return e.addMessageHandler(o),()=>{r=!0,e.removeMessageHandler(o)}},O=crypto.randomUUID?.bind(crypto)??(()=>new Array(4).fill(0).map((()=>Math.floor(Math.random()*Number.MAX_SAFE_INTEGER).toString(16))).join("-")),I=Symbol("CallOptions"),P=class{transferables;timeout;#e=I;constructor(e){this.transferables=e?.transferables,this.timeout=e?.timeout}},S=new Set(["apply","call","bind"]),R=(e,t,s=[])=>new Proxy(s.length?()=>{}:Object.create(null),{get(n,r){if("then"!==r)return s.length&&S.has(r)?Reflect.get(n,r):R(e,t,[...s,r])},apply:(t,n,r)=>e(s,r)}),A=e=>new a("CONNECTION_DESTROYED",`Method call ${y(e)}() failed due to destroyed connection`),C=(e,t,s)=>{let n=!1;const r=new Map,o=e=>{if(!w(e))return;const{callId:t,value:n,isError:o,isSerializedErrorInstance:i}=e,d=r.get(t);d&&(r.delete(t),s?.(`Received ${y(d.methodPath)}() call`,e),o?d.reject(i?(({name:e,message:t,stack:s,penpalCode:n})=>{const r=n?new a(n,t):new Error(t);return r.name=e,r.stack=s,r})(n):n):d.resolve(n))};return e.addMessageHandler(o),{remoteProxy:R(((o,i)=>{if(n)throw A(o);const d=O(),l=i[i.length-1],h=l instanceof P,{timeout:m,transferables:g}=h?l:{},p=h?i.slice(0,-1):i;return new Promise(((n,i)=>{const l=void 0!==m?window.setTimeout((()=>{r.delete(d),i(new a("METHOD_CALL_TIMEOUT",`Method call ${y(o)}() timed out after ${m}ms`))}),m):void 0;r.set(d,{methodPath:o,resolve:n,reject:i,timeoutId:l});try{const n={namespace:c,channel:t,type:"CALL",id:d,methodPath:o,args:p};s?.(`Sending ${y(o)}() call`,n),e.sendMessage(n,g)}catch(e){i(new a("TRANSMISSION_FAILED",e.message))}}))}),s),destroy:()=>{n=!0,e.removeMessageHandler(o);for(const{methodPath:e,reject:t,timeoutId:s}of r.values())clearTimeout(s),t(A(e));r.clear()}}},N=class extends Error{constructor(e){super(`You've hit a bug in Penpal. 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e.isError?{penpal:"reply",id:e.callId,resolution:"rejected",...e.isSerializedErrorInstance?{returnValue:e.value,returnValueIsError:!0}:{returnValue:e.value}}:{penpal:"reply",id:e.callId,resolution:"fulfilled",returnValue:e.value};throw T(e)})(e):e,n=this.#c(e);this.#t.postMessage(s,{targetOrigin:n,transfer:t})}else if(u(e)){const{port1:s,port2:n}=new MessageChannel;this.#i=s,s.addEventListener("message",this.#h),s.start();const r=[n,...t||[]],o=this.#c(e);this.#t.postMessage(e,{targetOrigin:o,transfer:r})}else{if(!this.#i)throw new N("Port is undefined");this.#i.postMessage(e,{transfer:t})}};addMessageHandler=e=>{this.#a.add(e)};removeMessageHandler=e=>{this.#a.delete(e)};destroy=()=>{window.removeEventListener("message",this.#l),this.#m(),this.#a.clear()};#g=e=>this.#s.some((t=>t instanceof RegExp?t.test(e):t===e||"*"===t));#c=e=>{if(g(e))return"*";if(!this.#o)throw new N("Concrete remote origin not set");return"null"===this.#o&&this.#s.includes("*")?"*":this.#o};#m=()=>{this.#i?.removeEventListener("message",this.#h),this.#i?.close(),this.#i=void 0};#l=({source:e,origin:t,ports:s,data:n})=>{if(e===this.#t&&((e=>h(e)&&"penpal"in e)(n)&&(this.#n?.("Please upgrade the child window to the latest version of Penpal."),this.#d=!0,n=(e=>{if("syn"===e.penpal)return{namespace:c,channel:void 0,type:"SYN",participantId:b};if("ack"===e.penpal)return{namespace:c,channel:void 0,type:"ACK2"};if("call"===e.penpal)return{namespace:c,channel:void 0,type:"CALL",id:e.id,methodPath:(t=e.methodName,t.split(".")),args:e.args};var t;if("reply"===e.penpal)return"fulfilled"===e.resolution?{namespace:c,channel:void 0,type:"REPLY",callId:e.id,value:e.returnValue}:{namespace:c,channel:void 0,type:"REPLY",callId:e.id,isError:!0,...e.returnValueIsError?{value:e.returnValue,isSerializedErrorInstance:!0}:{value:e.returnValue}};throw T(e)})(n)),this.#r?.(n)))if(this.#g(t)){if(g(n)&&(this.#m(),this.#o=t),u(n)&&!this.#d){if(this.#i=s[0],!this.#i)throw new N("No port received on ACK2");this.#i.addEventListener("message",this.#h),this.#i.start()}for(const e of this.#a)e(n)}else this.#n?.(`Received a message from origin \`${t}\` which did not match allowed origins \`[${this.#s.join(", ")}]\``)};#h=({data:e})=>{if(this.#r?.(e))for(const t of this.#a)t(e)}};e=s.hmd(e),n=window,r="StreamBIM",o=function(){return{connectToParent(e,t={}){const s=[];try{document.referrer&&s.push(new URL(document.referrer).origin)}catch(e){console.error(e)}const n=new x({remoteWindow:e,allowedOrigins:s});return this._connection=k({messenger:n,methods:t}),this._connection.promise.then((e=>{this.API=e}))},connectToChild(e,t={}){const s=new x({remoteWindow:e.contentWindow,allowedOrigins:[new URL(e.src).origin]});return this._connection=k({messenger:s,methods:t}),this._connection.promise.then((e=>{this.API=e}))},connectToWindow(e,t,s={}){const n=new x({remoteWindow:e,allowedOrigins:[new URL(t).origin]});return this._connection=k({messenger:n,methods:s}),this._connection.promise.then((e=>{this.API=e}))}}},e.exports?e.exports=o():"function"==typeof define&&s.amdO?define(r,o):n[r]=o()}},t={};function s(n){var r=t[n];if(void 0!==r)return r.exports;var o=t[n]={id:n,loaded:!1,exports:{}};return e[n](o,o.exports,s),o.loaded=!0,o.exports}s.amdO={},s.hmd=e=>((e=Object.create(e)).children||(e.children=[]),Object.defineProperty(e,"exports",{enumerable:!0,set:()=>{throw new Error("ES Modules may not assign module.exports or exports.*, Use ESM export syntax, instead: "+e.id)}}),e),s(691)})();
\ No newline at end of file
diff --git a/src/index.js b/src/index.js
index 1a04981..a67564e 100644
--- a/src/index.js
+++ b/src/index.js
@@ -17,11 +17,15 @@ import { WindowMessenger, connect } from 'penpal';
 }(window, 'StreamBIM', function () {
     return {
       connectToParent(parentWindow, methods = {}) {
-        const parent = parentWindow || window.parent;
+        const allowedOrigins = [];
+
+        if (document.referrer) {
+          allowedOrigins.push(new URL(document.referrer).origin);
+        }
 
         const messenger = new WindowMessenger({
-          remoteWindow: parent,
-          allowedOrigins: [parent.origin, new URL(document.referrer).origin]
+          remoteWindow: parentWindow,
+          allowedOrigins: allowedOrigins
         });
 
         this._connection = connect({