diff --git a/.github/workflows/ci-workflow.yml b/.github/workflows/ci-workflow.yml
index 8501071..38f5984 100644
--- a/.github/workflows/ci-workflow.yml
+++ b/.github/workflows/ci-workflow.yml
@@ -45,12 +45,12 @@ on:
     inputs:
       nix_version:
         type: string
-        default: '2.16.1'
+        default: '2.21.0'
         required: false
         description: |
           The version of Nix that should be used.
           See available versions at
-          https://github.com/nixbuild/nix-quick-install-action/releases/tag/v24.
+          https://github.com/nixbuild/nix-quick-install-action/releases/tag/v28.
 
       nix_conf:
         type: string
@@ -219,7 +219,7 @@ jobs:
       builds: ${{ steps.find-builds.outputs.builds }}
     steps:
       - uses: actions/checkout@v4
-      - uses: nixbuild/nix-quick-install-action@v24
+      - uses: nixbuild/nix-quick-install-action@v28
         with:
           github_access_token: ${{secrets.github_access_token}}
           nix_on_tmpfs: ${{inputs.nix_on_tmpfs}}
@@ -255,7 +255,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           lfs: ${{ inputs.lfs }}
-      - uses: nixbuild/nix-quick-install-action@v24
+      - uses: nixbuild/nix-quick-install-action@v28
         with:
           github_access_token: ${{secrets.github_access_token}}
           nix_on_tmpfs: ${{inputs.nix_on_tmpfs}}