Setting Your Elixir and Erlang Versions

Current defaultsMinimum supported

Elixir 1.16.1

Erlang/OTP 26.2.2

Services created before 2024-03-05 have different default versions. See below.

Elixir 1.12.0

Erlang/OTP 24.3.4

Existing services that use older versions can continue to do so until 2025-07-01. See details.

Elixir version 1.16.1 and Erlang/OTP version 26.2.2 are the defaults for Render services created on or after 2024-03-05.

You can specify your service's Elixir and/or Erlang/OTP version by setting environment variables:

Elixir

Add an environment variable called ELIXIR_VERSION to your service and set its value to a valid version (e.g., 1.14.5).

Supported Elixir versions are listed below.

If you don't also specify an Erlang/OTP version, Render automatically downloads an Erlang runtime that's compatible with your chosen Elixir version.

Supported Elixir versions

+ Click to show versions

  • 1.18.3
  • 1.18.2
  • 1.18.1
  • 1.18.0
  • 1.17.3
  • 1.17.2
  • 1.17.1
  • 1.17.0
  • 1.16.3
  • 1.16.2
  • 1.16.1
  • 1.16.0
  • 1.15.8
  • 1.15.7
  • 1.15.6
  • 1.15.5
  • 1.15.4
  • 1.15.3
  • 1.15.2
  • 1.15.1
  • 1.15.0

Erlang/OTP

Add an environment variable called ERLANG_VERSION to your app and set the value to a valid version (e.g., 24.3.4).

If you set an Erlang/OTP version, make sure it's compatible with your Elixir version!

Supported Erlang/OTP versions are listed below.

Note that 22.2 is a less recent version than 22.2.8, because valid versions are based on tags in the official Erlang repo.

Supported Erlang/OTP versions

+ Click to show versions

  • 27.3.3
  • 27.3.2
  • 27.3.1
  • 27.3
  • 27.2.4
  • 27.2.3
  • 27.2.2
  • 27.2.1
  • 27.2
  • 27.1.3
  • 27.1.2
  • 27.1.1
  • 27.1
  • 27.0.1
  • 27.0
  • 26.2.5
  • 26.2.4
  • 26.2.3
  • 26.2.2
  • 26.2.1
  • 26.2
  • 26.1.2
  • 26.1.1
  • 26.1
  • 26.0.2
  • 26.0.1
  • 26.0
  • 25.3.2
  • 25.3.1
  • 25.3
  • 25.2.3
  • 25.2.2
  • 25.2.1
  • 25.2
  • 25.1.2
  • 25.1.1
  • 25.1
  • 25.0.4
  • 25.0.3
  • 25.0.2
  • 25.0.1
  • 25.0
  • 24.3.4
  • 24.3.3
  • 24.3.2
  • 24.3.1
  • 24.3
  • 24.2.2
  • 24.2.1
  • 24.2
  • 24.1.7
  • 24.1.6
  • 24.1.5
  • 24.1.4
  • 24.1.3
  • 24.1.2
  • 24.1.1
  • 24.1
  • 24.0.6
  • 24.0.5
  • 24.0.4
  • 24.0.3
  • 24.0.2
  • 24.0.1
  • 24.0
  • 23.3.4
  • 23.3.3
  • 23.3.2
  • 23.3.1
  • 23.3
  • 23.2.7
  • 23.2.6
  • 23.2.5
  • 23.2.4
  • 23.2.3
  • 23.2.2
  • 23.2.1
  • 23.2
  • 23.1.5
  • 23.1.4
  • 23.1.3
  • 23.1.2
  • 23.1.1
  • 23.1
  • 23.0.4
  • 23.0.3
  • 23.0.2
  • 23.0.1
  • 23.0
  • 22.3.4
  • 22.3.3
  • 22.3.2
  • 22.3.1
  • 22.3
  • 22.2.8
  • 22.2.7
  • 22.2.6
  • 22.2.5
  • 22.2.4
  • 22.2.3
  • 22.2.2
  • 22.2.1
  • 22.2
  • 22.1.8
  • 22.1.7
  • 22.1.6
  • 22.1.5
  • 22.1.4
  • 22.1.3
  • 22.1.2
  • 22.1.1
  • 22.1
  • 22.0.7
  • 22.0.6
  • 22.0.5
  • 22.0.4
  • 22.0.3
  • 22.0.2
  • 22.0.1
  • 22.0
  • 21.3.8
  • 21.3.7
  • 21.3.6
  • 21.3.5
  • 21.3.4
  • 21.3.3
  • 21.3.2
  • 21.3.1
  • 21.3
  • 21.2.7
  • 21.2.6
  • 21.2.5
  • 21.2.4
  • 21.2.3
  • 21.2.2
  • 21.2.1
  • 21.2
  • 21.1.4
  • 21.1.3
  • 21.1.2
  • 21.1.1
  • 21.1
  • 21.0.9
  • 21.0.8
  • 21.0.7
  • 21.0.6
  • 21.0.5
  • 21.0.4
  • 21.0.3
  • 21.0.2
  • 21.0.1
  • 21.0
  • 20.3.8
  • 20.3.7
  • 20.3.6
  • 20.3.5
  • 20.3.4
  • 20.3.3
  • 20.3.2
  • 20.3.1
  • 20.3
  • 20.2.4
  • 20.2.3
  • 20.2.2
  • 20.2.1
  • 20.2
  • 20.1.7
  • 20.1.6
  • 20.1.5
  • 20.1.4
  • 20.1.3
  • 20.1.2
  • 20.1.1
  • 20.1
  • 20.0.5
  • 20.0.4
  • 20.0.3
  • 20.0.2
  • 20.0.1
  • 20.0
  • 19.3.6
  • 19.3.5
  • 19.3.4
  • 19.3.3
  • 19.3.2
  • 19.3.1
  • 19.3
  • 19.2.3
  • 19.2.2
  • 19.2.1
  • 19.2
  • 19.1.6
  • 19.1.5
  • 19.1.4
  • 19.1.3
  • 19.1.2
  • 19.1.1
  • 19.1
  • 19.0.7
  • 19.0.6
  • 19.0.5
  • 19.0.4
  • 19.0.3
  • 19.0.2
  • 19.0.1
  • 19.0
  • 18.3.4
  • 18.3.3
  • 18.3.2
  • 18.3.1
  • 18.3
  • 18.2.4
  • 18.2.3
  • 18.2.2
  • 18.2.1
  • 18.2
  • 18.1.5
  • 18.1.4
  • 18.1.3
  • 18.1.2
  • 18.1.1
  • 18.1
  • 18.0.3
  • 18.0.2
  • 18.0.1
  • 18.0
  • 17.5.6
  • 17.5.5
  • 17.5.4
  • 17.5.3
  • 17.5.2
  • 17.5.1
  • 17.5
  • 17.4.1
  • 17.4
  • 17.3.4
  • 17.3.3
  • 17.3.2
  • 17.3.1
  • 17.3
  • 17.2.2
  • 17.2.1
  • 17.2
  • 17.1.2
  • 17.1.1
  • 17.1
  • 17.0.2
  • 17.0.1
  • 17.0

History of default Elixir versions

If you don't set an Elixir version for your service, Render's default version depends on when you originally created the service:

Service Creation DateDefault Elixir Version
2024-03-05 and later1.16.1
2023-11-01 to 2024-03-051.15.6
Before 2023-11-011.9.4