# Regexp

**URL:** <https://community.cesium.com/t/regexp/7253>\
**Category:** CesiumJS\
**Created:** [August 4, 2018, 3:32pm UTC](https://community.cesium.com/t/regexp/7253 "2018-08-04T15:32:51Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![piperkov.dobri](https://avatars.discourse-cdn.com/v4/letter/p/a9adbd/32.png) [@piperkov.dobri](https://community.cesium.com/u/piperkov.dobri)\
**Post date:** [August 4, 2018, 3:32pm UTC](https://community.cesium.com/t/regexp/7253/1 "2018-08-04T15:32:51Z")

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Hi Cesium Team,

From some versions of Cesium i hava a problem with RegExp("[א-ת؀-ۿݐ-ݿࢠ-ࣿ]")  
and also with sandbox, in every new version i need to change Cesium.js file to fix this issues and then it work fine. I change:

RegExp("[א-ת؀-ۿݐ-ݿࢠ-ࣿ]") --\> RegExp("/א-ת؀-ۿݐ-ݿࢠ-ࣿ/"),

setAttribute("sandbox","allow-same-origin allow-popups allow-forms") --\>  
setAttribute("sandbox","allow-same-origin allow-popups allow-forms allow-scripts")

I think this problem occurs because my region is in Eastern Europe

Best Regards 🙂

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<div class="post-metadata">

**Author:** ![omar](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/omar/32/1999_2.png) [@omar](https://community.cesium.com/u/omar)\
**Post date:** [August 6, 2018, 3:21pm UTC](https://community.cesium.com/t/regexp/7253/2 "2018-08-06T15:21:53Z")

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Sorry you’ve had to repeatedly fix this!

Since you already know the fix, do you want to try [opening a pull request and making this contribution](https://github.com/AnalyticalGraphicsInc/cesium/blob/master/CONTRIBUTING.md) to Cesium? We’d appreciate it!