Setting Your Elixir and Erlang Versions
| Current defaults | Minimum supported |
|---|---|
|
Elixir Erlang/OTP Services created before 2024-03-05 have different default versions. See below. |
Elixir Erlang/OTP 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
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
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 Date | Default Elixir Version |
|---|---|
2024-03-05 and later | 1.16.1 |
2023-11-01 to 2024-03-05 | 1.15.6 |
Before 2023-11-01 | 1.9.4 |