# Publishing an Ionic-3 app to Android Store **URL:** \ **Category:** ionic-v3\ **Created:** [February 5, 2018, 5:28am UTC](https://forum.ionicframework.com/t/publishing-an-ionic-3-app-to-android-store/120457 "2018-02-05T05:28:38Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![khatauli](https://avatars.discourse-cdn.com/v4/letter/k/f9ae1b/32.png) [@khatauli](https://forum.ionicframework.com/u/khatauli)\ **Post date:** [February 5, 2018, 5:28am UTC](https://forum.ionicframework.com/t/publishing-an-ionic-3-app-to-android-store/120457/1 "2018-02-05T05:28:38Z")
Hi there, I created a release version of my APK, and then followed [https://ionicframework.com/docs/v1/guide/publishing.html](https://ionicframework.com/docs/v1/guide/publishing.html) to try to publish an app, but I am getting the following error: You uploaded an APK with an invalid signature (learn more about signing). Error from apksigner: ERROR (Jar signer xxx.RSA): JAR signature META-INF/xxx.RSA uses digest algorithm SHA-256 and signature algorithm RSA which is not supported on API Level(s) 16-17 for which this APK is being verified. Any help will be appreciated! ---
**Author:** ![cherry](https://sea1.discourse-cdn.com/ionicframework/user_avatar/forum.ionicframework.com/cherry/32/149370_2.png) [@cherry](https://forum.ionicframework.com/u/cherry)\ **Post date:** [February 5, 2018, 6:08am UTC](https://forum.ionicframework.com/t/publishing-an-ionic-3-app-to-android-store/120457/2 "2018-02-05T06:08:52Z")
It seems you try to sign the Package with an invalid algorithm, instead of using `SHA1withRSA` **use this** `SHA1with*`. _Since you are using a very old version of Android you have to use older methods of signing._ **Hope this helps!** 🐇 ---
**Author:** ![khatauli](https://avatars.discourse-cdn.com/v4/letter/k/f9ae1b/32.png) [@khatauli](https://forum.ionicframework.com/u/khatauli)\ **Post date:** [February 5, 2018, 7:44pm UTC](https://forum.ionicframework.com/t/publishing-an-ionic-3-app-to-android-store/120457/3 "2018-02-05T19:44:38Z")
Cherry, Thanks for the reply, but I sense some confusion. I am **not** using very old version of Android. I just developed my Ionic app using Ionic-3 (within last 3 months, and I am new to Android development), so I am not sure how I can be using the very old version of Android. I just need to know where to go to, to find the **latest** documentation to publish (if there is any) for publishing a **latest** Ionic-3 app to **latest** Android! ---
**Author:** ![cherry](https://sea1.discourse-cdn.com/ionicframework/user_avatar/forum.ionicframework.com/cherry/32/149370_2.png) [@cherry](https://forum.ionicframework.com/u/cherry)\ **Post date:** [February 6, 2018, 3:46am UTC](https://forum.ionicframework.com/t/publishing-an-ionic-3-app-to-android-store/120457/4 "2018-02-06T03:46:56Z")
Well it seems that you are using an older SDK, what you can do is to upgrade your SDK via the SDK manager. What I would recommend you to get is this version _else if this version gives you also errors try version 27_: ![grafik](https://global.discourse-cdn.com/ionicframework/original/3X/e/c/ec5c2e462207a88c7f03bc9c1b2f4c2df2182a8c.png) After you installed the package make sure you got the `Android SDK Built-tools` also installed. ![grafik](https://global.discourse-cdn.com/ionicframework/original/3X/9/f/9f7f52d34e731aaa169642de64e79781d4e09b04.png) Then you can start with the Guide you already posted. 🙂 ---
**Author:** ![khatauli](https://avatars.discourse-cdn.com/v4/letter/k/f9ae1b/32.png) [@khatauli](https://forum.ionicframework.com/u/khatauli)\ **Post date:** [February 6, 2018, 5:03am UTC](https://forum.ionicframework.com/t/publishing-an-ionic-3-app-to-android-store/120457/5 "2018-02-06T05:03:57Z")
I read that Google deprecated using RSA algorithm for building keystore. Here is the link: > **[How to Migrate Your Android App’s Signing Key](https://guardianproject.info/2015/12/29/how-to-migrate-your-android-apps-signing-key/)** > > It is time to update to a stronger signing key for your Android app! The old default RSA 1024-bit key is weak and officially deprecated. > What? The Android OS requires that every application installed be signed by a digital key. The purpose behind... Given this article, I have a feeling that this is the command which is causing the problem. keytool -genkey -v -keystore planetcal.keystore -alias PlanetCal -keyalg RSA -keysize 2048 -validity 10000 For password: I used “Testing123” _Anyway, about my installed versions (I believe they are latest):_ I installed Android Studio a few days back, and this is what I see at my end, which looks fairly latest to me! ![image](https://global.discourse-cdn.com/ionicframework/original/3X/a/9/a9c3dcc5fe29ca2ae45f66b674071de3821f1260.png) Also, the build tools version I am using for is 27.0.3 (For ZipAlign tool). ![image](https://global.discourse-cdn.com/ionicframework/original/3X/f/2/f2fe7a70af564463582a44005271f224b9b2d4d7.png) ---
**Author:** ![mhartington](https://sea1.discourse-cdn.com/ionicframework/user_avatar/forum.ionicframework.com/mhartington/32/137757_2.png) [@mhartington](https://forum.ionicframework.com/u/mhartington)\ **Post date:** [July 19, 2021, 9:51pm UTC](https://forum.ionicframework.com/t/publishing-an-ionic-3-app-to-android-store/120457/6 "2021-07-19T21:51:48Z")