Erlang/OTP 18.1 has been released!

OTP 18.1 Readme File

OTP 18.1 Source File (98237949)

OTP 18.1 Windows 32-bit Binary File (98237949)

OTP 18.1 Windows 64-bit Binary File (98749517)

OTP 18.1 HTML Documentation File (34049065)

OTP 18.1 Man Pages File (1390525)

Some highlights of the release are:

  • ssl: Add possibility to downgrade an SSL/TLS connection to a tcp connection, and give back the socket control to a user process.
  • ssh: The following new key exchange algorithms are implemented:'ecdh-sha2-nistp256', 'ecdh-sha2-nistp384', 'ecdh-sha2-nistp521','diffie-hellman-group14-sha1', 'diffie-hellman-group-exchange-sha1' and 'diffie-hellman-group-exchange-sha256'. This raises the security level considerably.

kernel,stdlib,sasl: A mechanism for limiting the amount of text that the built-in error logger events will produce has been introduced. It is useful for limiting both the size of log files and the CPU time used to produce them. 
This mechanism is experimental in the sense that it may be changed based on feedback. See config parameter error_logger_format_depth in the Kernel application.

Compiling Erlang from source

You can build Erlang from source on your own, following the building and installation instructions. Or use the Kerl script. Kerl is a script that lets you easily build Erlang with a few commands. Follow the instructions to build.

Finding a source version

Follow this link that presents all released source versions, a link to the GitHub source tag, and to the README.

Pre-built Binary Packages

Most OS package managers provide pre-built binary packages. You can also download the latest stable releases from Erlang Solutions. Erlang Solutions provides pre-built binary packages for OS X, Windows, Ubuntu, Debian, Fedora, CentOS, Raspbian and other operating systems. 

  • For Homebrew on OS X: brew install erlang
  • For MacPorts on OS X: port install erlang
  • For Ubuntu and Debianapt-get install erlang
  • For Fedorayum install erlang
  • For FreeBSDpkg install erlang


Since OTP 18.0, Erlang/OTP is released under Apache License 2.0. The older releases prior to 18.0 were released under Erlang Public License (EPL), a derivative work of the Mozilla Public License (MPL).