diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 02068db..dad3b5f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
       contents: read
     steps:
       - uses: actions/checkout@v5
-      - uses: DeterminateSystems/nix-installer-action@v20
+      - uses: DeterminateSystems/nix-installer-action@v21
         with:
           extra-conf: |
             accept-flake-config = true
@@ -34,7 +34,7 @@ jobs:
       - uses: docker/setup-qemu-action@v3
         with:
           platforms: arm64
-      - uses: DeterminateSystems/nix-installer-action@v20
+      - uses: DeterminateSystems/nix-installer-action@v21
         with:
           extra-conf: |
             extra-platforms = aarch64-linux