diff --git a/browser-source-map-support.js b/browser-source-map-support.js
index 782da50..742939c 100644
--- a/browser-source-map-support.js
+++ b/browser-source-map-support.js
@@ -103,12 +103,12 @@ g.originalLine;if(0!==v)return v;v=d.originalColumn-g.originalColumn;return 0!==
 return E&&/^\/\w:/.test(H)?(E+="/",E+n.resolve(F.slice(E.length),B).replace(/\\/g,"/")):E+n.resolve(F.slice(E.length),B)}function f(x){var B=h[x.source];if(!B){var F=N(x.source);F?(B=h[x.source]={url:F.url,map:new g(F.map)},B.map.sourcesContent&&B.map.sources.forEach(function(E,H){var M=B.map.sourcesContent[H];if(M){var S=m(B.url,E);b[S]=M}})):B=h[x.source]={url:null,map:null}}return B&&B.map&&"function"===typeof B.map.originalPositionFor&&(F=B.map.originalPositionFor(x),null!==F.source)?(F.source=
 m(B.url,F.source),F):x}function c(x){var B=/^eval at ([^(]+) \((.+):(\d+):(\d+)\)$/.exec(x);return B?(x=f({source:B[2],line:+B[3],column:B[4]-1}),"eval at "+B[1]+" ("+x.source+":"+x.line+":"+(x.column+1)+")"):(B=/^eval at ([^(]+) \((.+)\)$/.exec(x))?"eval at "+B[1]+" ("+c(B[2])+")":x}function l(){var x="";if(this.isNative())x="native";else{var B=this.getScriptNameOrSourceURL();!B&&this.isEval()&&(x=this.getEvalOrigin(),x+=", ");x=B?x+B:x+"<anonymous>";B=this.getLineNumber();null!=B&&(x+=":"+B,(B=
 this.getColumnNumber())&&(x+=":"+B))}B="";var F=this.getFunctionName(),E=!0,H=this.isConstructor();if(this.isToplevel()||H)H?B+="new "+(F||"<anonymous>"):F?B+=F:(B+=x,E=!1);else{H=this.getTypeName();"[object Object]"===H&&(H="null");var M=this.getMethodName();F?(H&&0!=F.indexOf(H)&&(B+=H+"."),B+=F,M&&F.indexOf("."+M)!=F.length-M.length-1&&(B+=" [as "+M+"]")):B+=H+"."+(M||"<anonymous>")}E&&(B+=" ("+x+")");return B}function q(x){var B={};Object.getOwnPropertyNames(Object.getPrototypeOf(x)).forEach(function(F){B[F]=
-/^(?:is|get)/.test(F)?function(){return x[F].call(x)}:x[F]});B.toString=l;return B}function r(x,B){void 0===B&&(B={nextPosition:null,curPosition:null});if(x.isNative())return B.curPosition=null,x;var F=x.getFileName()||x.getScriptNameOrSourceURL();if(F){var E=x.getLineNumber(),H=x.getColumnNumber()-1,M=/^v(10\.1[6-9]|10\.[2-9][0-9]|10\.[0-9]{3,}|1[2-9]\d*|[2-9]\d|\d{3,}|11\.11)/,S=M.test;var V="object"===typeof e&&null!==e?e.version:"";M=S.call(M,V)?0:62;1===E&&H>M&&!p()&&!x.isEval()&&(H-=M);var O=
-f({source:F,line:E,column:H});B.curPosition=O;x=q(x);var T=x.getFunctionName;x.getFunctionName=function(){return null==B.nextPosition?T():B.nextPosition.name||T()};x.getFileName=function(){return O.source};x.getLineNumber=function(){return O.line};x.getColumnNumber=function(){return O.column+1};x.getScriptNameOrSourceURL=function(){return O.source};return x}var Q=x.isEval()&&x.getEvalOrigin();Q&&(Q=c(Q),x=q(x),x.getEvalOrigin=function(){return Q});return x}function k(x,B){L&&(b={},h={});for(var F=
-(x.name||"Error")+": "+(x.message||""),E={nextPosition:null,curPosition:null},H=[],M=B.length-1;0<=M;M--)H.push("\n    at "+r(B[M],E)),E.nextPosition=E.curPosition;E.curPosition=E.nextPosition=null;return F+H.reverse().join("")}function u(x){var B=/\n    at [^(]+ \((.*):(\d+):(\d+)\)/.exec(x.stack);if(B){x=B[1];var F=+B[2];B=+B[3];var E=b[x];if(!E&&v&&v.existsSync(x))try{E=v.readFileSync(x,"utf8")}catch(H){E=""}if(E&&(E=E.split(/(?:\r\n|\r|\n)/)[F-1]))return x+":"+F+"\n"+E+"\n"+Array(B).join(" ")+
-"^"}return null}function d(){var x=e.emit;e.emit=function(B){if("uncaughtException"===B){var F=arguments[1]&&arguments[1].stack,E=0<this.listeners(B).length;if(F&&!E){F=arguments[1];E=u(F);var H="object"===typeof e&&null!==e?e.stderr:void 0;H&&H._handle&&H._handle.setBlocking&&H._handle.setBlocking(!0);E&&(console.error(),console.error(E));console.error(F.stack);"object"===typeof e&&null!==e&&"function"===typeof e.exit&&e.exit(1);return}}return x.apply(this,arguments)}}var g=C("source-map").SourceMapConsumer,
-n=C("path");try{var v=C("fs");v.existsSync&&v.readFileSync||(v=null)}catch(x){}var z=C("buffer-from"),G=!1,D=!1,L=!1,a="auto",b={},h={},w=/^data:application\/json[^,]+base64,/,y=[],I=[],K=t(y);y.push(function(x){x=x.trim();/^file:/.test(x)&&(x=x.replace(/file:\/\/\/(\w:)?/,function(E,H){return H?"":"/"}));if(x in b)return b[x];var B="";try{if(v)v.existsSync(x)&&(B=v.readFileSync(x,"utf8"));else{var F=new XMLHttpRequest;F.open("GET",x,!1);F.send(null);4===F.readyState&&200===F.status&&(B=F.responseText)}}catch(E){}return b[x]=
-B});var N=t(I);I.push(function(x){a:{if(p())try{var B=new XMLHttpRequest;B.open("GET",x,!1);B.send(null);var F=B.getResponseHeader("SourceMap")||B.getResponseHeader("X-SourceMap");if(F){var E=F;break a}}catch(M){}E=K(x);B=/(?:\/\/[@#][\s]*sourceMappingURL=([^\s'"]+)[\s]*$)|(?:\/\*[@#][\s]*sourceMappingURL=([^\s*'"]+)[\s]*(?:\*\/)[\s]*$)/mg;for(var H;F=B.exec(E);)H=F;E=H?H[1]:null}if(!E)return null;w.test(E)?(H=E.slice(E.indexOf(",")+1),H=z(H,"base64").toString(),E=x):(E=m(x,E),H=K(E));return H?{url:E,
-map:H}:null});var P=y.slice(0),W=I.slice(0);A.wrapCallSite=r;A.getErrorSource=u;A.mapSourcePosition=f;A.retrieveSourceMap=N;A.install=function(x){x=x||{};if(x.environment&&(a=x.environment,-1===["node","browser","auto"].indexOf(a)))throw Error("environment "+a+" was unknown. Available options are {auto, browser, node}");x.retrieveFile&&(x.overrideRetrieveFile&&(y.length=0),y.unshift(x.retrieveFile));x.retrieveSourceMap&&(x.overrideRetrieveSourceMap&&(I.length=0),I.unshift(x.retrieveSourceMap));if(x.hookRequire&&
-!p()){var B=J.require("module"),F=B.prototype._compile;F.__sourceMapSupport||(B.prototype._compile=function(E,H){b[H]=E;h[H]=void 0;return F.call(this,E,H)},B.prototype._compile.__sourceMapSupport=!0)}L||(L="emptyCacheBetweenOperations"in x?x.emptyCacheBetweenOperations:!1);G||(G=!0,Error.prepareStackTrace=k);if(!D){x="handleUncaughtExceptions"in x?x.handleUncaughtExceptions:!0;try{!1===J.require("worker_threads").isMainThread&&(x=!1)}catch(E){}x&&"object"===typeof e&&null!==e&&"function"===typeof e.on&&
-(D=!0,d())}};A.resetRetrieveHandlers=function(){y.length=0;I.length=0;y=P.slice(0);I=W.slice(0);N=t(I);K=t(y)}}).call(this,C("g5I+bs"))},{"buffer-from":4,fs:3,"g5I+bs":9,path:8,"source-map":20}]},{},[1]);return R});
+/^(?:is|get)/.test(F)?function(){return x[F].call(x)}:x[F]});Object.defineProperty(B,"toString",{value:l});return B}function r(x,B){void 0===B&&(B={nextPosition:null,curPosition:null});if(x.isNative())return B.curPosition=null,x;var F=x.getFileName()||x.getScriptNameOrSourceURL();if(F){var E=x.getLineNumber(),H=x.getColumnNumber()-1,M=/^v(10\.1[6-9]|10\.[2-9][0-9]|10\.[0-9]{3,}|1[2-9]\d*|[2-9]\d|\d{3,}|11\.11)/,S=M.test;var V="object"===typeof e&&null!==e?e.version:"";M=S.call(M,V)?0:62;1===E&&H>
+M&&!p()&&!x.isEval()&&(H-=M);var O=f({source:F,line:E,column:H});B.curPosition=O;x=q(x);var T=x.getFunctionName;x.getFunctionName=function(){return null==B.nextPosition?T():B.nextPosition.name||T()};x.getFileName=function(){return O.source};x.getLineNumber=function(){return O.line};x.getColumnNumber=function(){return O.column+1};x.getScriptNameOrSourceURL=function(){return O.source};return x}var Q=x.isEval()&&x.getEvalOrigin();Q&&(Q=c(Q),x=q(x),x.getEvalOrigin=function(){return Q});return x}function k(x,
+B){L&&(b={},h={});for(var F=(x.name||"Error")+": "+(x.message||""),E={nextPosition:null,curPosition:null},H=[],M=B.length-1;0<=M;M--)H.push("\n    at "+r(B[M],E)),E.nextPosition=E.curPosition;E.curPosition=E.nextPosition=null;return F+H.reverse().join("")}function u(x){var B=/\n    at [^(]+ \((.*):(\d+):(\d+)\)/.exec(x.stack);if(B){x=B[1];var F=+B[2];B=+B[3];var E=b[x];if(!E&&v&&v.existsSync(x))try{E=v.readFileSync(x,"utf8")}catch(H){E=""}if(E&&(E=E.split(/(?:\r\n|\r|\n)/)[F-1]))return x+":"+F+"\n"+
+E+"\n"+Array(B).join(" ")+"^"}return null}function d(){var x=e.emit;e.emit=function(B){if("uncaughtException"===B){var F=arguments[1]&&arguments[1].stack,E=0<this.listeners(B).length;if(F&&!E){F=arguments[1];E=u(F);var H="object"===typeof e&&null!==e?e.stderr:void 0;H&&H._handle&&H._handle.setBlocking&&H._handle.setBlocking(!0);E&&(console.error(),console.error(E));console.error(F.stack);"object"===typeof e&&null!==e&&"function"===typeof e.exit&&e.exit(1);return}}return x.apply(this,arguments)}}var g=
+C("source-map").SourceMapConsumer,n=C("path");try{var v=C("fs");v.existsSync&&v.readFileSync||(v=null)}catch(x){}var z=C("buffer-from"),G=!1,D=!1,L=!1,a="auto",b={},h={},w=/^data:application\/json[^,]+base64,/,y=[],I=[],K=t(y);y.push(function(x){x=x.trim();/^file:/.test(x)&&(x=x.replace(/file:\/\/\/(\w:)?/,function(E,H){return H?"":"/"}));if(x in b)return b[x];var B="";try{if(v)v.existsSync(x)&&(B=v.readFileSync(x,"utf8"));else{var F=new XMLHttpRequest;F.open("GET",x,!1);F.send(null);4===F.readyState&&
+200===F.status&&(B=F.responseText)}}catch(E){}return b[x]=B});var N=t(I);I.push(function(x){a:{if(p())try{var B=new XMLHttpRequest;B.open("GET",x,!1);B.send(null);var F=B.getResponseHeader("SourceMap")||B.getResponseHeader("X-SourceMap");if(F){var E=F;break a}}catch(M){}E=K(x);B=/(?:\/\/[@#][\s]*sourceMappingURL=([^\s'"]+)[\s]*$)|(?:\/\*[@#][\s]*sourceMappingURL=([^\s*'"]+)[\s]*(?:\*\/)[\s]*$)/mg;for(var H;F=B.exec(E);)H=F;E=H?H[1]:null}if(!E)return null;w.test(E)?(H=E.slice(E.indexOf(",")+1),H=z(H,
+"base64").toString(),E=x):(E=m(x,E),H=K(E));return H?{url:E,map:H}:null});var P=y.slice(0),W=I.slice(0);A.wrapCallSite=r;A.getErrorSource=u;A.mapSourcePosition=f;A.retrieveSourceMap=N;A.install=function(x){x=x||{};if(x.environment&&(a=x.environment,-1===["node","browser","auto"].indexOf(a)))throw Error("environment "+a+" was unknown. Available options are {auto, browser, node}");x.retrieveFile&&(x.overrideRetrieveFile&&(y.length=0),y.unshift(x.retrieveFile));x.retrieveSourceMap&&(x.overrideRetrieveSourceMap&&
+(I.length=0),I.unshift(x.retrieveSourceMap));if(x.hookRequire&&!p()){var B=J.require("module"),F=B.prototype._compile;F.__sourceMapSupport||(B.prototype._compile=function(E,H){b[H]=E;h[H]=void 0;return F.call(this,E,H)},B.prototype._compile.__sourceMapSupport=!0)}L||(L="emptyCacheBetweenOperations"in x?x.emptyCacheBetweenOperations:!1);G||(G=!0,Error.prepareStackTrace=k);if(!D){x="handleUncaughtExceptions"in x?x.handleUncaughtExceptions:!0;try{!1===J.require("worker_threads").isMainThread&&(x=!1)}catch(E){}x&&
+"object"===typeof e&&null!==e&&"function"===typeof e.on&&(D=!0,d())}};A.resetRetrieveHandlers=function(){y.length=0;I.length=0;y=P.slice(0);I=W.slice(0);N=t(I);K=t(y)}}).call(this,C("g5I+bs"))},{"buffer-from":4,fs:3,"g5I+bs":9,path:8,"source-map":20}]},{},[1]);return R});
diff --git a/source-map-support.js b/source-map-support.js
index 2942b5e..9e3cfb0 100644
--- a/source-map-support.js
+++ b/source-map-support.js
@@ -361,7 +361,13 @@ function cloneCallSite(frame) {
   Object.getOwnPropertyNames(Object.getPrototypeOf(frame)).forEach(function(name) {
     object[name] = /^(?:is|get)/.test(name) ? function() { return frame[name].call(frame); } : frame[name];
   });
-  object.toString = CallSiteToString;
+
+  // If the Object prototype is frozen, the "toString" property is non-writable. This means that any objects which inherit this property
+  // cannot have the property changed using an assignment. If using strict mode, attempting that will cause an error. If not using strict
+  // mode, attempting that will be silently ignored.
+  // However, we can still explicitly shadow the prototype's "toString" property by defining a new "toString" property on this object.
+  Object.defineProperty(object, 'toString', { value: CallSiteToString });
+
   return object;
 }