diff --git a/elixir_buildpack.config b/elixir_buildpack.config
index 946408c12..45cb644a3 100644
--- a/elixir_buildpack.config
+++ b/elixir_buildpack.config
@@ -1,2 +1,2 @@
-elixir_version=1.9.4
-erlang_version=22.3.4.1
+elixir_version=1.11
+erlang_version=23.3.4.2
diff --git a/mix.exs b/mix.exs
index afb4da1f6..78981c36f 100644
--- a/mix.exs
+++ b/mix.exs
@@ -5,7 +5,7 @@ defmodule Pleroma.Mixfile do
     [
       app: :pleroma,
       version: version("2.3.50"),
-      elixir: "~> 1.9",
+      elixir: "~> 1.11",
       elixirc_paths: elixirc_paths(Mix.env()),
       compilers: [:phoenix, :gettext] ++ Mix.compilers(),
       elixirc_options: [warnings_as_errors: warnings_as_errors(Mix.env())],