diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ac8453a..e72a6b1 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -28,7 +28,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
   tests:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     strategy:
       matrix:
         ruby: ['2.7', '3.0', '3.1', '3.2', '3.3']
@@ -36,7 +36,9 @@ jobs:
     steps:
       - name: install image processing dependencies
         run: |
-          sudo apt-get install -yqq liblcms2-utils libglib2.0-dev libgtk2.0-dev libgdk-pixbuf2.0-dev libvips
+          sudo apt-get update \
+          && sudo apt-get install -yqq \
+             liblcms2-utils libglib2.0-dev libgtk2.0-dev libgdk-pixbuf2.0-dev imagemagick libvips
       - name: checkout repo
         uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
       - name: unlock the gem versions