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engirah's avatar
engirah
Helpful | Level 5
4 years ago
Solved

Received fatal alert: protocol_version

Hi Am suddenly getting below error after using the dropbox API for over 3 years. No Change in Java code(Java 😎 Am using dropbox-core-sdk-3.0.5.jar library Could be there is a change in SSL protoc...
Developers
  • Greg-DB's avatar
    Greg-DB
    4 years ago

    Dropbox recently retired support for TLS 1.0 and 1.1. The Dropbox API servers now only support connections using TLS 1.2. You'll need to update your app/network client/environment to use TLS 1.2 in order to continue making Dropbox API calls.

     

    It looks like you're using the Dropbox Java SDK, so to use TLS 1.2 you'll need to update to at least v3.1.1 of that SDK (or preferably, the latest version which is currently v5.2.0).

chek534's avatar
chek534
Explorer | Level 4
4 years ago

Greg-DB

 

I updated dropbox-core-sdk to 4.0.1 version and still received error:

  Received fatal alert: protocol_version

Greg-DB's avatar
Greg-DB
Icon for Dropbox Community Moderator rankDropbox Community Moderator
4 years ago

chek534 Make sure your platform itself also supports TLS v1.2. Some platforms/frameworks, especially older versions, may not have TLS v1.2 enabled. You may need to refer to your platform documentation for information on configuring that.

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