diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index ce8b3f1..71a73eb 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -1,7 +1,7 @@
 # syntax=docker/dockerfile:1
 
 # Update the VARIANT arg in docker-compose.yml to pick an Elixir version: 1.9, 1.10, 1.10.4
-ARG VARIANT="1.18.2"
+ARG VARIANT="1.18.3"
 FROM elixir:${VARIANT}
 
 # This Dockerfile adds a non-root user with sudo access. Update the “remoteUser” property in
diff --git a/.devcontainer/compose.yml b/.devcontainer/compose.yml
index aa72ad0..68729a7 100644
--- a/.devcontainer/compose.yml
+++ b/.devcontainer/compose.yml
@@ -5,7 +5,7 @@ services:
       dockerfile: Dockerfile
       args:
         # Elixir Version: 1.9, 1.10, 1.10.4, ...
-        VARIANT: '1.18.2'
+        VARIANT: '1.18.3'
         # Phoenix Version: 1.4.17, 1.5.4, ...
         PHOENIX_VERSION: '1.7.19'
         # Node Version: 12, 14, ...
diff --git a/.tool-versions b/.tool-versions
index 368092a..2c22153 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,2 +1,2 @@
-elixir 1.18.2-otp-27
+elixir 1.18.3-otp-27
 erlang 27.3
diff --git a/Dockerfile b/Dockerfile
index 646abbc..01624b3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,7 +13,7 @@
 #   - https://pkgs.org/ - resource for finding needed packages
 #   - Ex: hexpm/elixir:1.15.4-erlang-26.0.2-debian-bullseye-20230612-slim
 #
-ARG ELIXIR_VERSION=1.18.2
+ARG ELIXIR_VERSION=1.18.3
 ARG OTP_VERSION=27.3
 ARG DEBIAN_VERSION=bullseye-20250224-slim
 
diff --git a/README.md b/README.md
index bbc93be..5f30e05 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ The purpose of this example is to provide details as to how one would go about u
 
 ## Software requirements
 
-- Elixir 1.18.2 or newer
+- Elixir 1.18.3 or newer
 
 - Erlang 27.3 or newer
 
diff --git a/mix.exs b/mix.exs
index 4480caa..5312dc8 100644
--- a/mix.exs
+++ b/mix.exs
@@ -5,7 +5,7 @@ defmodule ZeroPhoenix.Mixfile do
     [
       app: :zero_phoenix,
       version: "3.6.0",
-      elixir: "~> 1.18.2",
+      elixir: "~> 1.18.3",
       elixirc_paths: elixirc_paths(Mix.env()),
       start_permanent: Mix.env() == :prod,
       aliases: aliases(),