Currently the planned coordination to upgrade the Stellar public network to Protocol 11 is scheduled for June 10th, 2019 at 1600 UTC. In order to be prepared for the upcoming switch, all developers building on Stellar will need to take the following steps to ensure compatibility with the upgrade:

Upgrade to the latest Stellar SDK version for your respective language, making sure that it supports Protocol 11. You can find 

links on our developer portal to both official and community-maintained SDKs

Upgrade any Horizon instances to a version >v0.17.5. As of this writing, the latest version is 

Upgrade any Stellar Core instances to a version >v11.0.0. As of this writing, the latest version is 

If you are running your own custom client that interprets Stellar’s XDR, make sure it is compatible with Protocol 11 (

If you’re running a validator and not aware of the planned coordination, please email 

stellar-validators+subscribe@googlegroups.com

 for the latest information, along with #validators on 

Currently the planned coordination to upgrade the Stellar public network to Protocol 11 is scheduled for June 10th, 2019 at 1600 UTC.

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Stellar Protocol 11 Public Network Upgrade

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