# Ghost says invalid ZIP when upload my theme **URL:** \ **Category:** Developer help\ **Created:** [November 12, 2018, 2:20pm UTC](https://forum.ghost.org/t/ghost-says-invalid-zip-when-upload-my-theme/4001 "2018-11-12T14:20:11Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![vasanthdeveloper](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.ghost.org/vasanthdeveloper/32/5227_2.png) [@vasanthdeveloper](https://forum.ghost.org/u/vasanthdeveloper)\ **Post date:** [November 12, 2018, 2:20pm UTC](https://forum.ghost.org/t/ghost-says-invalid-zip-when-upload-my-theme/4001/1 "2018-11-12T14:20:11Z")
Hello, I am developing my second Ghost theme named “[Aakari](https://github.com/vasanthdeveloper/aakari)”. Just before releasing the theme, I realized that Ghost is not allowing my theme to upload. I prepare the ZIP file of my theme with the `npm run package` command. Which actually runs `gulp package` . The package task for Gulp is directly copied from the default Casper theme’s `gulpfile.js`. Here is the console output of Ghost when uploading my theme: ![Capture](https://us1.discourse-cdn.com/flex015/uploads/ghost2/original/2X/8/8d5738bda520a1e2f8c5d7a7bd9995208010c927.png) As the error says, I tested the generated archive using 7-Zip and WinRAR and both say that it is a valid archive. I also manually prepared an archive using 7-Zip and did not apply any compression. But still, I get this error. Please help me solve it and release my theme. This is a free theme and the whole source code is available for anybody who would like to use it, on GitHub. [https://github.com/vasanthdeveloper/aakari](https://github.com/vasanthdeveloper/aakari) * * * ## Update 2: Tired of creating the ZIP archive in a Linux environment. A co-developer I work with pointed out [this](https://github.com/TryGhost/Ghost-Admin/pull/238) issue on GitHub. After reading and doing a bit of experiment, I decided to create the ZIP archive in a Linux environment. I used WSL (Windows Subsystem for Linux), and installed Ubuntu 18.04 and ran the `npm run package` command once again. And ☹ sadly, the ZIP file did not get accepted by Ghost. * * * - **Version** 2.5.0 - **Environment** development - **Database** sqlite3 - **Mail** Native Thank You 🙂 ---
**Author:** ![Kate](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.ghost.org/kate/32/35_2.png) [@Kate](https://forum.ghost.org/u/Kate)\ **Post date:** [November 15, 2018, 7:58am UTC](https://forum.ghost.org/t/ghost-says-invalid-zip-when-upload-my-theme/4001/2 "2018-11-15T07:58:58Z")
Could you pls open the developer console in your browser and record the upload request? The request will show you which content type is used in the form. Thanks 🙂 ---
**Author:** ![vasanthdeveloper](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.ghost.org/vasanthdeveloper/32/5227_2.png) [@vasanthdeveloper](https://forum.ghost.org/u/vasanthdeveloper)\ **Post date:** [November 16, 2018, 2:04pm UTC](https://forum.ghost.org/t/ghost-says-invalid-zip-when-upload-my-theme/4001/3 "2018-11-16T14:04:14Z")
Thanks for responding. Below is the screenshot of the error shown in Developer Tools Google Chrome Console: ![Capture](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex015/uploads/ghost2/original/2X/3/33715f414ddfaf7a0e7434ae8f6b4ccdebc7b774.png) ---
**Author:** ![Kevin](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.ghost.org/kevin/32/32_2.png) [@Kevin](https://forum.ghost.org/u/Kevin)\ **Post date:** [November 16, 2018, 2:30pm UTC](https://forum.ghost.org/t/ghost-says-invalid-zip-when-upload-my-theme/4001/4 "2018-11-16T14:30:17Z")
@vasanthdeveloper what we need is the network request headers to show which content type was sent by your browser. Eg: ![32](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex015/uploads/ghost2/original/2X/3/3daa3b05b81f0af7fb899b7fca4ce5c69b19d130.png) ---
**Author:** ![vasanthdeveloper](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.ghost.org/vasanthdeveloper/32/5227_2.png) [@vasanthdeveloper](https://forum.ghost.org/u/vasanthdeveloper)\ **Post date:** [November 19, 2018, 6:44pm UTC](https://forum.ghost.org/t/ghost-says-invalid-zip-when-upload-my-theme/4001/5 "2018-11-19T18:44:21Z")
I am really sorry for not responding from last 3 days. My health was a bit upset. Though I use the exact same GulpJS code from the Casper theme. It does not work. ☹ Below is the screenshot of the Network tab: ![Capture](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex015/uploads/ghost2/original/2X/a/a1dc47b0f07d402568670c11453884069bdff032.png) I really don’t know what is happening here though I am a web developer. The Content-Type seems to be different. Please help me ☹ ---
**Author:** ![Kevin](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.ghost.org/kevin/32/32_2.png) [@Kevin](https://forum.ghost.org/u/Kevin)\ **Post date:** [November 19, 2018, 7:11pm UTC](https://forum.ghost.org/t/ghost-says-invalid-zip-when-upload-my-theme/4001/6 "2018-11-19T19:11:36Z")
The content-type is set by the browser/OS when uploading the file rather than by whatever generates the zip file. In this case your browser is sending `.zip` which is something we haven’t seen before so our content type validations are getting confused. Our validation will need to be updated to account for it. ---
**Author:** ![system](https://us1.discourse-cdn.com/flex015/uploads/ghost2/original/2X/b/ba9ce5100b8bb264586f4f572545596b2ce3f081.png) [@system](https://forum.ghost.org/u/system)\ **Post date:** [December 3, 2018, 7:11pm UTC](https://forum.ghost.org/t/ghost-says-invalid-zip-when-upload-my-theme/4001/7 "2018-12-03T19:11:38Z")
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