diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 6017157..5b297a3 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -23,7 +23,7 @@ jobs:
         working-directory: ${{ matrix.tuleap_functions }}
     steps:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
-      - uses: cachix/install-nix-action@6004951b182f8860210c8d6f0d808ec5b1a33d28 # v25
+      - uses: cachix/install-nix-action@8887e596b4ee1134dae06b98d573bd674693f47c # v26
       - name: Prepare
         run: nix-shell --run "make prepare"
       - name: Tests