diff --git a/.tool-versions b/.tool-versions
index a50d88e..6e9c564 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,3 +1,3 @@
-elixir 1.13.2-otp-24
+elixir 1.13.4-otp-24
 erlang 24.2
 nodejs 16.13.2
diff --git a/Dockerfile b/Dockerfile
index 3c28a3e..7024fc8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM elixir:1.13-alpine AS build
+FROM elixir:1.13.4-alpine AS build
 
 # install build dependencies
 RUN apk add --no-cache build-base npm git python3
diff --git a/mix.exs b/mix.exs
index d52f0e7..be4415b 100644
--- a/mix.exs
+++ b/mix.exs
@@ -5,7 +5,7 @@ defmodule Cannery.MixProject do
     [
       app: :cannery,
       version: "0.5.0",
-      elixir: "~> 1.12",
+      elixir: "1.13.4",
       elixirc_paths: elixirc_paths(Mix.env()),
       compilers: [:gettext] ++ Mix.compilers(),
       start_permanent: Mix.env() == :prod,