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Bitcoin Core Adopting Controversial OP_RETURN Change

Bitcoin’s Core 30 update will ditch the OP_RETURN data limit, a move that has angered some hardliners.
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Jun 10, 2025 • 1 min read

Bitcoin Core will remove its 80-byte OP_RETURN limit in its v30 update, enabling 4MB data outputs and stirring intense community debate.

What’s the Scoop?

  • Expanded Capacity: Bitcoin Core's new update removes the 80-byte OP_RETURN limit, allowing up to 4MB of data per output, effective October 30.
  • Motivation for Change: The update aims to prevent harmful data storage methods that bloat Bitcoin's memory and centralize transaction processing.
  • Community Debate: The decision has sparked backlash, with critics arguing the change alters Bitcoin's peer-to-peer payment focus.

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