diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 27bcf3b..aa783e2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,8 +7,8 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        otp-version: [27.0]
-        elixir-version: [1.17.1]
+        otp-version: [27.3]
+        elixir-version: [1.18.4]
 
     env:
       MIX_ENV: test
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 6aa791b..5476a1b 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -14,8 +14,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: erlef/setup-beam@v1
         with:
-          otp-version: 27.x
-          elixir-version: 1.18.x
+          otp-version: 27.3
+          elixir-version: 1.18.4
       - run: sudo apt-get update
       - run: sudo apt-get install -y libvips-dev
       - run: vips --vips-version
diff --git a/mix.exs b/mix.exs
index 041330a..57b0b76 100644
--- a/mix.exs
+++ b/mix.exs
@@ -7,7 +7,7 @@ defmodule PlugImageProcessing.Mixfile do
     [
       app: :plug_image_processing,
       version: @version,
-      elixir: "~> 1.13",
+      elixir: "~> 1.15",
       package: package(),
       elixirc_paths: elixirc_paths(Mix.env()),
       compilers: Mix.compilers(),